Laura's grandma visits and tells Laura about her long-lost friend and their identical clocks. Laura decides to search for grandma's friend. Hamtaro tells the ham-hams and they decide to help out. They go to elder-ham and he leads them to the spot that Laura's grandma and her friend vowed to meet each other again someday. Hamtaro sees grandma's friend and sees Laura going the wrong way. he goes down and turns on grandma's friend's clock, and Laura hears it. She goes to get her grandma. They run toward each other and they remember the day they made their promise.