Peter is a freelance photographer who travels to a secluded island for a photo shoot with his girlfriend. The only other guest on the island happens to be Peter's ex (shock!). The "X-Deal" part of the story is that Peter gets to have one night with his ex in exchange for the same deal for the two women. So far so good, and is it hot in here, or is it just me?

Threesome offers a lot in the way of eye candy. Not only is the island a beautiful setting, but the models/girls are also very attractive. Threesome takes its time to build up to the sexy parts, which is an interesting approach for a soft erotic movie. The director is obviously interested in bettering the previous installment, which was a low-budget effort with a similar script.

Once the story has had time to breathe, it's not long before everyone is in varying states of undress, frolicking around on the beach and in the sea. As it turns out, Peter isn't such a great guy and things start to get very rough between the three players. The story does offer a few little surprises and turns, which makes it more enjoyable to watch.

Overall, Threesome - Dreieck der Sünde offers a solid erotic drama in a very exotic location.