After Laura's parents have an argument, Dad leaves the house with Laura. As a worried Hamtaro watches them go, the Ham-poet Jingle appears. In the meantime, Laura and her dad go to the department store and buy her mom a pretty pendant for Laura’s parent’s anniversary, but when they get home, Laura discovers the pendant is missing.

Laura’s social studies class takes a field trip to the harbor to ride a sightseeing boat. Boss claims to be an expert on boats and harbors, so the hamsters follow along. When they get there, however, they soon realize that Boss has never been near a boat or a harbor in his whole hamster life.

The hamster siblings, Stan and Sandy have one of their heated arguments, and Sandy’s ribbon is torn and Stan’s maracas are broken. The Ham-Hams decide that the twins need to make up, so they plan a surprise party for their birthday.

Snoozer sleeps so peacefully that no Ham would know how busy his dreams are. In one dream, the Ham-Hams are in a castle town and Robin Ham (played by Hamtaro) is going to Chick-ah Chick-ah Castle to visit the sick father of Maid Laurien.