One night when a ship lands in the plane tree in front of Theo’s window and an honest-to-goodness pirate furtively enters his room, Theo at first believes it to be a bad dream. But then the crazy crew of the big three-masted ship takes him on an adventurous journey across the seven seas. Along the way, Theo has to rise above his limitations to defy the dangers of the oceans but he also because this journey brings him a little closer to his missing father.