Mistaken identity leads a young woman down a trail of sin ....

When a young man addresses eighteen-year-old Alison as Ali, a name used only by her close friends, she believes it to be a case of mistaken identity. However, when a second man greets her as Ali and tells her that her new dark hair doesn't suit her as well as her usual blonde, the adopted Alison begins to think she may have a twin sister who has moved into her neighborhood. Determined to get to the bottom of the mystery, she dyes her hair blonde and takes on the other girl's identity, plunging into an underworld of seedy bars and depraved sex. Before long she is reveling in her newfound life of sexual abandon, until she fi nally meets her elusive counterpart and makes a shocking discovery, one that forces her to decide on her direction in life. Can she revert to the refined young lady she once was or will she pursue her darker sexual needs?