Tom, Carrie, Em and Michael are still living on their own at World's End. In between wondering where the next meal will come from, and trying to avoid interfering grown-ups, they are never short of fun and excitement. Carrie cannot stand to see an animal suffer, and when she plunges into another rescue operation, more perilous than any she has attempted before – putting her, and faithful dog Charlie, into terrible danger – things quickly spiral out of control. Desperately the children struggle to save Charlie from a dreadful fate; but it is a race against time.

Summer at World's End is the second adventure in The World's End Series.