A novel for children aged 9–12. The London cats are fleeing along the M4 to find refuge in Tircoed in West Wales. they are escaping from the cat flu virus and unpleasant memories of Old Gap-tooth, a giant rat in the sewers beneath Trafalgar Square. Meanwhile, there is a power struggle among the Welsh cats, and their cockney visitors can expect a stormy reception. Can they survive the ambush on the bridge at dawn?