A mystery chomper is out to ruin the sweetness of summer - and Father's Day! Without berries (and homemade jam) Father's Day will be a bust. But who emptied the berry basket? Polly the pony, Pal the dog, and the twins are all on the suspect list. The kids need to uncover the culprit and protect the strawberry patch before they end up in a real jam without a gift for dad!