Upon moving to Hoboken, New Jersey, a boy convinces his two new friends to help him track down the mysterious phantom who stole his bicycle, as well as Arthur Bobowicz, owner of a giant chicken that once terrorized local citizens.
Three Hoboken children and their giant chicken Henrietta set off to explore the world of art after being inspired by the sidewalk drawings of a local chalk artist.
Although they intend to live up to their notorious reputations when they are invited to a fancy hotel party, polar bears Irving and Muktuk end up behaving themselves when a scary bunny shows up.