When Raimy and Frank speak over the ham-radio and she lets him know that her mom will be murdered unless Frank can figure out a way to warn her, she also delivers devastating news regarding Stan Moreno. Meanwhile, in 2016, Raimy follows a lead in the Nightingale case, and in 1996, Frank and Satch work together to follow the same lead.

A female police detective in 2016 discovers she is able to speak via a ham radio with her father (also a detective) who died in 1996. They forge a new relationship while working together on an unresolved murder case, but unintended consequences of the ‘butterfly effect' wreak havoc in the present day.