A scientist who is working on developing a source of clean energy is found murdered. The list of suspects leads Kiera on a journey that takes her to a precarious place – deciding between the right thing to do and the preservation of the future.
Weaver is still in command of the 2nd Mass, while Anne continues to serve as medic. They have seen many battles and are a much leaner unit now. Pope has taken command of the Berserkers, a renegade group within the 2nd Mass that Weaver doesn’t fully trust.
Tom is haunted by memories of his time with the aliens. Pope plants seeds of doubt about him among the group. Ben’s hatred for skitters grows. The 2nd Mass locate a bridge that will help them cross the river to safety ahead of an impending attack.
Hannah begins questioning her romantic relationship with Adam. Marnie decides to embrace her free-spirited nature during a mystery party that Jessa is hosting. Shoshanna benefits from her unique personality and characteristics.
While Jim helps Callie settle into her new apartment in Atlanta, Carlos performs a guest autopsy for Daniel's forensics class at Tampa Tech. He discovers that the cadaver he is dissecting is actually a murder victim who turns out to be a student that was killed while participating in an on-campus pharmaceutical study. Also, the Palm Glade substation gets a new addition when FDLE Bureau Chief Jennifer Starke comes down to visit Manus, while Callie gets off to a rocky start with her new boss Dr. Miranda Buckley.