This is an enjoyable puzzle of a movie by Hideo Nakata, the director of Ringu. What starts out as a simple kidnapping soon becomes a complex story told in a cut-up narrative style that can be hard to follow if you're not paying attention. Through the twists and turns you're given answers, and then more questions until everything is resolved, sort of. If you enjoy well-crafted, sophisticated films in the tradition of Hitchcock or Lynch I think you will enjoy this.