Raimy and Frank make a startling discovery about the Nightingale killer. Meanwhile, Frank is blindsided by a shocking betrayal.

Frank and Raimy put a plan in motion for Frank to kill the Nightingale. Frank finds himself agonizing over whether it's the right thing to do, and Raimy is confronted with an unexpected moral decision.

Raimy and Frank find themselves in the thick of things. Meanwhile, Frank learns the meaning behind a betrayal.