Sailor Mouse runs away to sea looking for adventure. But he had better look out because there are pirates about looking for adventure too! Sailor Mouse is so excited to be a real sailor and he is very keen to help around the boat. But when he is given the chance to steer the boat he goes far too fast and almost crashes into a lighthouse!
Perhaps he'll be safer on dry land . . . but, no, the shipmates are not the only ones on Coconut Island as Sailor Mouse is about to find out! Wherever there is treasure, pirates are sure to be close by and Sailor Mouse finds himself being taken as their prisoner!