Joe is off on a school trip to an adventure park, and he can’t wait to put Uncle Charlie’s survival tips into practice! But it’s not long before he’s visited by Dexter, a scruffy-looking dog, with a howling tale of woe. Dexter doesn’t want his owner feeling guilty for his death, but it’ll be hard for Joe to help this time it turns out that the owner is Joe’s headmaster, the dreaded Mr. Hill!