The famous ship called ''Mayflower'' is trapped amidst a huge storm. The entire story is narrated by a church-mouse called Willum, from his viewpoint. The tale begins with the pilgrim preachers deciding to move to America and getting aboard the ''Mayflower''. However, because of the huge storm, the ship gets on the verge of sinking. Then, Willum, the pilgrim mouse, comes up with an idea to save the ship.