Tillie Bassett is sad, and she doesn't understand why. Her parents and friends suggest very different, allegedly helpful, remedies. But her counsellor, Gilbert the Goldfish, suggests a quest: to find out what happiness is, for others and herself. As Tillie embarks upon her quest she discovers that, when it comes to family and friends, nothing is quite as it seems. Secrets are uncovered, old tensions resurface, relationships tangle and untangle, and Tillie realises the truth about happiness and sadness.
