When young John goes fishing, he catches something so strange, so ugly and so wormy that he throws it straight back in again. But back in the river the wormy thing grows - and grows and grows! And when it crawls out of the river, there is only one person who can sort this problem out.When young John goes fishing, he catches something so strange, so ugly and so wormy that he throws it straight back in again. But back in the river the wormy thing grows - and grows and grows! And when it crawls out of the river, there is only one person who can sort this problem out.