Jack's Granny is sick with a bad case of the moozles! And the only cure is the fruit of the fantastic flumflum tree which grows on the faraway Isle of Blowyernose. It's a perilous journey, but Jack bravely sets sail, with a motley crew of only three, and a large patchwork sack that Granny has filled with an odd assortment of items from chewing gum to tent pegs. But what use will they be against hungry sharks, a leaky boat and a thieving monkey.