Ambrose may seem like an ordinary rabbit but he has the most extraordinary sense of smell. He can detect any aroma from sweets to kittens - and even niffy foxes!

He lives with his family in a hutch and is visited every day by Biddy, who is desperate to take him home to be her pet - if only her mum and dad would let her. Biddy trains Ambrose to become a tracker rabbit - which comes in very handy when Ambrose's little sister Roly goes missing. But when Biddy's family find themselves in real danger, can Ambrose's sensitive nose save the day?