When Flight 828 lands in New York, Michaela and Ben Stone and the other passengers learn that years have passed, but they haven't aged a day. They reunite with loved ones, piece together their old lives and deal with mysterious voices in their heads.

Michaela is conflicted when she faces her best friend, who is now married to Jared. Mysterious music in Ben's mind moves him to help a fellow Flight 828 passenger connect with his imprisoned son. Olive urges Grace to tell Ben her secret.

Ben and Michaela fear a link between a shocking murder and Flight 828. Meanwhile, Ben struggles to accept the life Grace led in his absence.

Michaela and Saanvi have a similar vision, but it takes them some trial, error and teamwork to heed the call. Jared takes the fall for Michaela's misstep at work, and Ben comes face-to-face with the man who replaced him.

Flashbacks reveal how the group coped with the loss of their loved ones after the disappearance of Flight 828. Ben tries to escape the voice in his mind by going on an adventure with Cal, and Michaela struggles with her feelings for Jared.

When Cal wakes with a life-threatening fever, Ben and Michaela point the finger at a mysterious plane passenger, who strangely seems to have vanished.