Henry has a vested interest in studying the dead: He is immortal, and only his best friend and confidant, Abe, full of life at age 75, knows Henry's secret. Henry hasn't aged at all since the clock stopped 200 years ago, but he's managed to be discreet without anyone finding out his affliction. That task becomes increasingly difficult when he meets NYPD detective Jo Martinez, who is fascinated by Henry after learning he was the sole survivor of a horrific train crash.