It's Christmas Eve When Eric Seagull receives an invitation to The Christmas Circus at Ladybird Cove, the herring gull invites his two friends along. With his tiny best friend and housemate Mouse Herbie, the white mouse, safely aboard his inner feathers and Norman Mail Pigeon following closely behind, they take off from Eric's home (Rock-Face Nest) at St Mary's Bay in wintry South Devon. After sea-faring adventures with Lady Beatrice, Arthur Jelly-fish and the Dawn Chorus, Eric spots a sign: 'Christmas Circus This Way'. But the adventurers soon discover double trouble awaits them inside The Big Top. Whatever will happen next?