The Normandy crashed on an unknown jungle planet, and Shepard is presumed dead. But she came back from the dead once, and Kaidan refuses to sit around not knowing for sure. But the mass effect relays are broken, Edi isn't running the Normandy, and no one knows for sure if the Reapers are dead. Set right after the end of the game, if Shepard destroyed the Reapers. Strong language.