'We don't want to warn the smugglers that we have discovered their little game. We want to try and catch them!'

The Famous Five are excited to fill George's boat with food and blankets and spend the week on Kirrin Island, swimming and exploring.

But when they discover a mysterious trunk has been smuggled onto the island, they realise an even bigger adventure lies ahead. And after they hear a child's scream in the middle of the night, they must find out - who else is there with them... and why?