After escaping her sexually dominant husband, dating coach Charlotte is ready to play it safe. But when her client, Gail, disappears after visiting a fetish-oriented club called Subspace, Charlotte must enter the erotic underworld to find out what happened to her. Club owner Master Martin is willing to help Charlotte - as long as she agrees to a little role-playing. As Charlotte slowly surrenders to Martin's sensual enticements, she finds that her penchant for submission is more intense than ever. But at the same time, as her search for Gail leads her deep inside Subspace's catacombs, Charlotte fears it may already be too late to save Gail...or herself.