Little Bear and owl are fishing when a fog rolls in.  They accidentally catch a huge sea monster who drags them out to sea.  Fortunately, Little Bear's friend Mermaid comes to help them unhook the monster and returns them back to the dock just in time for lunch.

Little Bear is missing his doll, Fisherman Bear, and Mother Bear suspects that it is somewhere in Little Bear's very messy room. Mother Bear and Little Bear have fun hunting for Fisherman Bear, and end up cleaning Little Bear's room in the process.