Dead Drops is a quest received from the Favors for Certain Interested Parties Quest Board at Gnawed Noble Tavern.
Walkthrough
The objective of this quest is to discreetly drop off "payment" for certain individuals, as contracted out by the rogue "K". The locations you must visit are:
Redcliffe Village - Past Owen's blacksmith shop, near Dwyn's house.
Lake Calenhad Docks - At the The Spoiled Princess inn.
Frostback Mountain Pass - Near Ahren, the dwarf "merchant" who won't trade with you.
Denerim Market District - Near Cesar and a cage.
Before running around Thedas, the quest will end with a choice you have to make, return to all the locations and defuse the drops, or leave them be. If you choose the former, setup the route you take to be efficient - for example, you have to go back to the Denerim Market District to collect on the quest anyway, so leave that one for last.
If you decide to leave the drops alone, return to the Bartender and collect your reward; on the other hand, if you decide to disarm them, a proficient rogue will be required to disarm the traps. (Detonating them by either failing to disarm them or poking them with a stick, will have the same effect on the quest). After disarming them all, you can still collect your reward, but the rogue "K" will be quite upset and not offer you any more jobs.
Rewards
4 
On PC, patch 1.04 I got 6 ((g)) for completing this quest by leaving the "payment" as is and going to the Bartender