Willy Hedgehog, Harvey Mouse, and Rue Rabbit vacation by the sea, stumbling upon shadowy smugglers hiding illicit goods in a creaky lighthouse. Posing as pint-sized detectives, the trio thwarts the crooks with clever tricks and seaside savvy, saving the day for their seaside chums. The Patersons' cozy, detailed watercolors evoke nostalgic village vibes, a gentle adventure blending mystery and mischief for whimsical woodland pals.