A cold-case victim leads Raimy and Satch to a big break in the investigation, a room where the Nightingale held his first victim.

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.