Two very different animals have urgent problems! Primrose, (a Song Thrush) has to keep her younger sister (Debby) and her younger brother (Tim) safe - whilst at the same time, finding food for the family. Since their mother's disappearance a few days ago. Meanwhile Arthur, (a young Guinea Pig) has problems of his own. He is lonely and cannot find the right food to keep him healthy. A chance meeting between the two leads to cooperation - but can they make it work? Various adventures provide the answer.