When Frankie and his friends are whisked to the Canadian Rockies they land with a splash - straight into a freezing river. Thank goodness for a giant rescue dog who turns up just in time. To return the favour, the friends save the dog's owner, Danni, from a grizzly bear. But when they get back to school, they realize their mission isn't over yet. Something has followed them through the portal... Can they return a large, furry creature to Canada, and help their new friend win the tournament of her life?