Tim is thrilled when his parents allow his best friend, Biscuits, to
come on holiday to Llanpistyll, Wales, with them. He and Biscuits are
having an absolutely brilliant time eating ice cream, having picnics,
and making sandcastles-until a deadly, fiendish enemy in the form of the
bully Prickle-Head and his sidekick, Pinch-Face, arrive, and things
begin to go wrong.
The bullies tease Tim, kick down his sandcastle, and pick on Biscuits,
and before long Tim wonders whether it would be better to avoid the
beach for a while and lie low. But Biscuits is determined to enjoy his
holiday, and the chums soon find themselves in the middle of a dire and
dangerous adventure. Luckily, help comes from a rather unexpected source
and gives Tim the chance to become Super-Tim and save the day.