Captain Harry and his crew set sail once more, this time hoping to find the home of the mermice - well, at least that's what Harry's hoping, his first mate, Barnacles, would rather be anywhere else. Being in the sea was bad enough, but with the evil Captain Edric for company, foul tasting seaweed, a distinct lack of cheese and more magical creatures than any sensible mouse would want to deal with, even Harry may have bitten off more than he can chew.