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.

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.