When decorated soldier Captain Colter Stevens wakes up in the body of an unknown man, he discovers he's part of a mission to find the bomber of a Chicago commuter train.
To win the celebrity and self-made wealth he craves, an aimless, twenty-something Manhattan playboy devises a film based on his party-boy, club-going lifestyle, and hires a self-destructive aspiring playwright to ghost the feature script.
There's a new teacher in town—Spelunker! This unusual man is anything but a typical instructor, giving speeches about traffic safety to the students, reacting strangely to a humidifier, and enjoying lunch— albeit with ample condiment mishaps.