Can the friendship between Harriet, who skates for fun, and Lalla Moore, future world champion, survive the threat from Lalla's formidable Aunt Claudia? When Harriet needs to recover after a long illness, her doctor tells her to take up skating. Although no good at it, she admires the children -- like Lalla Moore -- in the centre of the rink who seem to be able to do anything they want on the ice. And when it turns out that Lalla's father and Harriet's father were at school together, and they can be friends, her happiness is complete. But Lalla is only happy when she is the best, and when Harriet begins to compete on equal terms, their friendship looks like falling apart...