A little girl disappears, prompting Merton to begin a desperate search, convinced her errant father has snatched her. Blaketon decides to lend his expertise to the case - only to end up fighting for his life. Steve and Bellamy's dedication to duty sees them placing their lives on the line to rescue the youngster. Meanwhile, Vernon offers his services in pest control when the Aidensfield Arms is hit by a rat infestation.