The Davidson family, Mum, Dad, Marcia and the baby, Phil, are having a bad time. Dad was ill and lost his job, meals are skimpy. Then one day Mum finds bags of groceries on the doorstep. Phil is determined to discover who put them there. When he does the answer is astounding. Moyle, their benefactor, is a Mondro. These creaures live on Earth but aren’t human: their lives are very different from ours.