Previously, on Mass Effect 3…
You're Commander Shepard, racing to build the Crucible superweapon and unite the galaxy against the Reapers. You just chased the last missing piece — the Catalyst — to Thessia, the asari homeworld, as it fell to the Reapers.
- WHERE: Thessia, burning under the Reaper invasion - QUEST: "Priority: Thessia" — hunting the Catalyst clue hidden in a Prothean temple
RIGHT NOW: Recover from the loss — Cerberus's assassin Kai Leng stole the Catalyst information and escaped, leaving you a step behind the Illusive Man.