A surprise tip points Cordelia to three of the President's lesser-known housemates: his brother Tripp, his mother-in-law Nan and his top advisor, Harry.

As dawn breaks, Cordelia faces pressure to end the residence's lockdown. Meanwhile, in the present day, a fresh testimony upends the Senate hearing.

Elsyie, a housekeeper, is the most-liked employee in the residence. But Cordelia suspects there's more to her than meets the eye.

As the clock ticks down on her investigation, Cordelia is ready to reveal the murderer in the residence — even if she has to do it on the fly.