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

The team waits for a witness to regain consciousness; A submersible looks for Flight 716's final resting place.

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.

Kendra comes up with a plan to confront the Flight 716 conspirators and expose the cover up.