Shelly, a determined hermit crab, and her best friend Crumbles, who lives in a rusty tin can, set off to find Crumbles a proper shell. Along the way, they meet a curious young girl on the beach, surrounded by shiny seashells she plans to take home.
Through heartfelt conversations, Shelly and Crumbles teach the girl a valuable lesson: seashells are not just treasures—they’re vital homes for hermit crabs. By leaving shells on the beach, children like her can help protect marine life and ensure crabs like Crumbles thrive.