A boy haunted by visions of a parallel world aids its disillusioned guardian in preventing the destruction of the nexus of universes known as the Dark Tower.

Tracy, a lonely college freshman in New York, is rescued from her solitude by her soon-to-be stepsister Brooke, an adventurous gal about town who entangles her in alluringly mad schemes.

In this comedic fantasy, science has facilitated the search for a soul mate via biotechnological implants that count down to the moment one is supposed to meet his or her…