Two friends: one big, one little. One old, one young. One grumpy, one cheerful. Both: monsters! Reggie's plan is to spend the whole summer brooding over his latest adventure gone wrong. But his friendly and curious neighbor, Emily, won't let him sit alone and unhappy in his house forever! Despite their differences, these two monsters make the perfect pair of explorers. And with a map to make, a beach party to plan, and a sea monster to find, Reggie will have to learn to talk about his feelings and let new friends in!