It's Felix's birthday tomorrow, and his best friend, Fiona, has promised to bake cupcakes to celebrate. But the next morning, Fiona arrives at the party with no cupcakes . . . and a very tall tale. Fiona's little lie points the finger at three likely suspects, but Felix has a feeling that she might be getting in deeper and deeper. Now Fiona doesn't know which is worse - forgetfulness or a queasy conscience. Luckily she has a friend like Felix to whisper some advice into her ear!