A crazy pirate crew, a powerful wizard, and a dark secret. One night, when a ship lands in the plane tree outside Theo's window and a genuine pirate sneaks into his room, Theo initially thinks he is having a bad dream. But then, the crazy crew of the great three-masted ship takes him on an adventurous journey across the seven seas. Along the way, Theo must continually rise above himself - to face the dangers of the oceans, but also because this journey brings him a little closer to his missing father...