When a woman meets the man of her dreams, what possibly could go wrong? A lot, actually, if the charming, funny and good-looking guy becomes his mate's worst nightmare. Those are the types of handsome devils profiled in this series, which exposes the secrets of charming beaus who turned into cunning killers. Each hourlong episode features one story interlaced with commentary from law enforcement authorities and true-crime professionals, as well as first-person accounts from friends and families of the victims.