The infamous Captain Blacktail and his crew of swashbuckling rats set sail upon the high seas in search of a treasure equal to the ransom of kings upon kings. Many would-be plunderers have set forth to claim the treasure of the Cat O' Nine Tails-only never to return. A young mouse known as Pip will find his life forever changed as he journeys to uncharted waters on an adventure with Captain Blacktail and the rat crew of the Vile Vermin.