"Grant, Weng-Ho, and Seve are surprised to discover a new kid in class. He dresses like a cowboy. He has nothing to say. And most mysteriously, he cries! What's the matter? How can they help. By paying attention to details and solving clues that mysteriously appear on a chalkboard, the boys resolve the mystery, make a new friend ... and in the process, learn something they never knew about the traditional cowboy way of life!"--Page 4 of cover.