Meredith's dishonesty is revealed, leading to unexpected consequences for her and others; the new chief resident is chosen.
While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak.
As the Cohens prepare for Kirsten's 40th birthday party, Kirsten gets some news that will change her life forever. Meanwhile, Julie is having a secret love affair-and Kaitlin is doing everything she can to stop it.
In the aftermath of a major earthquake that cuts off power and communication between the Cohens and their loved ones, Seth must take over Ryan's role as the protector when Ryan is injured and the boys are stranded on a deserted road.
When an Army veteran threatens to blow up a pawn shop, Sullivan reflects on his time as a Marine to deescalate the situation; Vic and Dean try to reason with a man battling Alzheimer's disease; Pruitt takes a stand to honor fallen firefighters.
