I was a Rat! Roger insists, and insists . . . In fact, when Bob the cobbler and his washerwoman wife, Joan, find the young boy abandoned on their doorstep, these are the only words he says. And he does have ratty behaviour, it's true.

Staying with Bob and Joan, however, Roger learns quickly to behave more like a human child. They try to find his parents, but the orphanage, police and hospital all have nothing on their records about a lost boy in the city. What is the truth? As more and more people find out about Roger the mysterious rat-boy he faces more and more danger. But sometimes help comes from the most unexpected of places . . .