Steve and Liz comes to the aid of an amnesiac struggling to piece together his identity, but they soon discover jogging the newcomer's memory may not be a good idea when they become uncover a shocking case of domestic violence. Meanwhile, Bernie and David are once again left picking up the pieces when Vernon becomes morbid and sets out to make an everlasting impact on the world, whilst Jenny issues Merton a few home truths about the troubles in their marriage.

After David witnesses a man getting thrown off a moving train, it leads to Steve foiling an armed robbery at Ashfordly Hall, but also leaves an escaped convict loose in Aidensfield. As the team pursue him, Ventress feels lost without the police force and is delighted when Merton comes up with a solution. Meanwhile, Vernon is stalked by a donkey, but later turns it to his advantage by opening up a donkey sanctuary, only to have his plans opposed when he discovers a sanctuary already exists in the village.