Any cat born with three legs faces a difficult future, but when born on a farm and expected to hunt rats, three legs is a disaster. That is the predicament facing our protagonist, Ralph. But Ralph is no self-pitying failure. He has been blessed with a kind and loving heart and a will to overcome his physical weakness. He easily accumulates friends and learns skills far beyond those of any ordinary cat. And when he feels ready, he sets out on a journey to find his missing father. That journey leads him far from home, through dog and coyote attacks, a paralyzing injury, a reluctant stint as a circus performer, escape, capture by hunters, and slavery as a ratter in the hold of a cargo ship where he faces death from rogue cats.