Marla the badger lives peacefully in a sett with Cadoc, her mate, and their three young cubs. They are unaware of the threat approaching - badger baiters are operating in the area, hunting for badgers to sell and use in the cruel 'sport' of badger baiting.

Meanwhile the twins Tom and Sarah, living on a nearby farm, have accidentally stumbled on evidence of badger baiting in their neighbourhood. They and their dad become increasingly involved in trying to prove this illegal activity to the police. When the law fails to step in, Tom and Sarah have to act alone to save Marla and her family from a terrible fate ...