When TransOcean Flight 716 vanishes over the Atlantic Ocean with 256 people on board, crash investigator Kendra Malley is called in.

The hunt for wreckage continues as the TSIB team learn more about Donovan. Kendra wonders if the plane's lone survivor is hiding something.

Madelyn’s memories of the crash provide the team with a lead, and a new witness comes forward with disturbing information about Donovan.

Kendra tries to make sense of conflicting evidence and is stunned by the betrayal of someone close to her, while AJ puts his life in danger.

An unlikely source has proof of a conspiracy to cover up the truth about the crash, and the team scramble to recover the black boxes.