Tiggy and Tobias are brother seacats. They share a lighthouse and a backyard of sand but no common thread in personality. Tiggy is a brave hunter, while Tobias would rather hunt for seashells along the shore. Hard feelings are exchanged when Tiggy accuses Tobias of lacking seacat bravery. Tobias meets a friendly pelican, who embraces his seacat style. Tides turn one morning when Tobias must find the courage to rescue Tiggy, who has gone missing.