Rosina Draghina, an Italian monster, gets lost from her friend Cossie while playing in the woods. She ends up in Portugal where Mr. Francisco, a gardener, finds her. He helps her get on a train back to Italy to search for Cossie at a school. When she arrives, she learns from her friend Juvenal that Cossie has left for England. Juvenal and Rosina then travel together to Cossington, England to find Cossie at his school.