At last, Henry Huggins's father has promised to take him fishing, on one condition. Henry's dog, Ribsy, has been in all sorts of trouble lately, from running off with the neighbor's barbecue roast to stealing a policeman's lunch. To go on the fishing trip, Henry must keep Ribsy out of trouble—no chasing cats, no digging up lawns, and no getting anywhere near little Ramona Quimby!