Raimy and Satch discover a shocking connection to the Nightingale's first kill. When Raimy shares this news with Frank, he works to dig up additional information. Meanwhile, Frank and Julie are forced to have an honest conversation, and Raimy has a surprise visitor.

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.