Go to your estate; Gamlen is here but Leandra is not. She did not show up for their weekly meeting. Bodahn says she may be with her suitor who has sent her some flowers.
- If you tell Gamlen about the killer from Prime Suspect then he refuses to believe it and goes to search for her in Lowtown.
- If you tell him she's probably with her suitor then he isn't convinced and leaves to retrace her path from your home to his.
After Gamlen leaves, Bodahn suggests searching for her in Lowtown at night.
- If you killed Gascard DuPuis during the Prime Suspect quest, or you let him go but told Moira that he fooled you, or that it's not that simple and then told her he is in Darktown, then you can report Leandra's disappearance to Moira in the Gallows Courtyard, though doing so has no lasting effect. During this conversation she will tell you that DuPuis has been executed by the Templars.
- Otherwise you can tell Moira that Leandra is missing but it makes no difference in the quest.
- If you tell him to perform the ritual then you are transported to the Dark Foundry; Gascard will accompany your party through the area.
- If you turn down Gascard's offer then the conversation ends, but it is still possible to accept his offer by talking to him again.
Meet Gamlen in Lowtown at night. Speak to the Urchin and either pay Varric: friendship (+5) or intimidate him Varric: rivalry (+5) to obtain information. Then follow the blood trail to the Dark Foundry entrance.
When you arrive at the foundry, follow the blood trail to a trapdoor.
The Killer's Lair
If Gascard DuPuis is with you then he will not join in on any battles until you reach the killer, and his character model simply runs around and tends to get in the way of your targeting. He also offers no commentary on what you discover. Electricity and nature damage have the greatest effects on the shades encountered in here, but corpses are best handled by electricity, as they are immune to nature on Nightmare difficulty. Abominations can cause interruptions with their claw swipes, as can the shades if they deal enough damage, so avoid letting them secure multiple positions around a character at once. Beyond this, rage demons should be stunned or frozen before they can slip into the ground and deliver fiery backstabs. Depending on your abilities you may want to opt for stunning a cluster of Normal-ranked enemies instead before commanding the whole party to attack the rage demon at once.
As you battle through the area you will come across notes and an odd painting that begin to paint a picture of what's happening. Be sure to take Orichalcum and the Act 2 signature gloves (which are dependent on class) before you reach the final room.
At the end of the next hallway, a cut scene plays where you confront the killer, Quentin, and see for yourself the disturbing results of his actions.
If Gascard is with you then he reveals his ulterior motives; Quentin was once his teacher in the art of necromancy, but refused to teach him all of what he knew. Gascard still intends to work with you to kill him and take his research notes, but Quentin will offer to "be the mentor [he] deserved" now that his "work" is finished. Gascard will, after some hesitation, accept and take the side of the killer against you unless:
- You are a diplomatic or aggressive Hawke, in which case you can talk him into helping you or intimidate him out of getting between you and Quentin. Sarcastic Hawkes have no such option.
- If Varric is in the party, he will sense a betrayal and put a crossbow bolt in Gascard's neck. This takes place before the dialogue, so players wishing to keep Gascard alive should check Hawke's personality before speaking to him in Darktown, to make sure they even have that option.
During the fight, the killer will summon swarms of abominations, shades, and corpses, plus three "Possessions" of his victims in the form of desire demons. You must slay these in order for him to lower the shield he generates around himself, as Dispel Magic cannot remove it. Each Possession leads a wave of demons and undead, so the same tactics for one wave will work in the subsequent two. Retreating into the passageway upstairs should provide a decent place to use AoEs like Firestorm and/or Tempest, while giving you a buffer between slaying the third Possession and Quentin joining the battle properly. He is an Elite-ranked Blood Mage and should be stunned and slain before he can unleash a single Hemorrhage, as on most difficulties it can drain your party's life to nothing while healing him faster than he can be damaged. You will not be given time to loot the bodies after Quentin dies, so try and do it during the fight.
If Gascard joins Quentin, he is a Normal-ranked blood mage and should be killed immediately, before he's influenced the fight too much. After that, the same strategy as not having him present or killed by Varric will apply.
If he stands with you, however, his Hemorrhages will still hurt you on Nightmare difficulty, so pull everyone away from him and let him hold the bulk of the threat. Like all optional invincible allies his support is unnecessary, even on Nightmare, but unlike other temporary allies his support can actually make the fight more difficult, especially when he casts Hemorrhage on the enemies attacking you in melee range and even if they're immune to its spirit element. This problem is most apparent with the shades and sometimes the desire demons, so deal with any that target your allies immediately and leave the corpses and abominations to Gascard, then use ranged attacks to clean up any shades around him, but if any of them break off to attack you, kill them before they get too close and Gascard moves the Hemorrhage to right on top of you. When Quentin is the only enemy left, the two blood mages tend to cast dueling Hemorrhages on each other, creating a field that is fatal to your party. As they're both immune, they will deal no damage to each other and cast the fields infinitely, but Quentin will still recover health at a steady rate (indicating that the spell's health regeneration is separate from its damage). All of these factors taken together essentially requires a ranged party with at least one or two surviving to the end and micromanaging melees so they don't dash through the Hemorrhage trying to engage the Skeleton Archers. In short, Gascard's "help" makes the fight more difficult than it ought to be, but it can still be won in spite of him.
- If Gascard DuPuis is with you in the killer's lair for the meeting with Quentin, then he is either killed by Varric before the battle, he is killed by you during the battle, or you convinced him to fight on your side and he survived.
- Unlocks Following the Qun and The Captain's Condolences, a companion quest.
- The Gloves of the Overseer, Gloves of Enasalin, or Stonehammer Gauntlets are in a chest in the killer's lair, before the final encounter, depending on Hawke's class.
- In the Killer's Lair there is a letter to the killer from someone in the Circle of Magi, congratulating him on his discoveries and indicating that the writer has placed certain books on magic in a drop-off place for Quentin to obtain. The letter is signed "O."
- No matter which option you choose above (with Gascard's help or without), there is no way to save your mother from her unfortunate fate. Before Leandra dies, she tells Hawke that she is proud of him/her.
- If a companion was romanced, they will come to console you in your bedroom at the Estate excluding Sebastian. (This happens after the conversation with Gamlen) If no companions are romanced, Aveline will come saying she has heard the news and that you know where to find her. In any case, The Captain's Condolences will initiate.
- Isabela points out that at least Hawke had a loving mother. She will try to console Hawke by telling them that the murderer will harm no one else, and says she believes Leandra would be proud.
- 1, 750 XP, and Tine (quest completion).
- If you recruited Gascard in Darktown, and he survives, you can talk to him after in Darktown. Bringing Aveline or Fenris to interrogate him proves enlightening. Aveline is given preference over Fenris, regardless of friendship or romance status.
- The title of the quest may be a reference to the novel All That Remains by Patricia Cornwell, also involving the hunt for a serial killer.
- pcps3xbox360 If you complete this quest by going to Gascard DuPuis in Darktown instead of going to Lowtown, you might still see Gamlen and the Urchin in Lowtown after the quest. Talking to the Urchin starts the dialogue and suggests that the quest has been started. It also gives rivalry points depending on your actions. The quest immediately says it's completed afterwards. However, the completed quest text will now read "Follow the trail of blood", instead of noting Leandra's death.
- pcxbox360 Before talking to Leandra, DuPuis' disembodied voice may offer condolences despite you having killed him.
- pc This quest is susceptible to the "Loading..." bug that some others are. If the game is killed and the resumed from a point after the combat starts, Gascard shows up with the party even if he was killed by Varric. He does nothing, cannot be talked to and is gone for good once the cut scene loads correctly.
- Moira may be spoken to about Leandra's disappearance even if the quest has already been completed.