Henry is grumpy. He's the grumpiest hippo around. One day Henry finds a note in a floating bottle, and what he reads sets off a whole set of events which are seemingly out of his control. When he is ultimately faced with the consequences of his actions, will Henry come out on the other side with a new attitude, or will he return to the same old grumpy hippo he's always been? Follow Henry in this funny tale as he shows us that our attitude affects not only us, but everything and everyone around us.