As a steam train races through the Devonshire countryside,Humphrey and Esther join the Shipton Abbott Players for amurder mystery rehearsal. Though Humphrey is only playing adetective, things turn from amateur to professional when theactor playing the victim is found dead with a real knife in hisback.Life begins to imitate art as the pretend suspects becomeall too real, and the steam train is scoured for genuineclues. With the victim barely known to his fellow performers,and the whole group under suspicion, the team sets out tounravel a dark past that reveals hidden connections between theactors.Meanwhile, love is in the air as Humphrey and Marthaenjoy date nights and Anne throws herself into the world ofonline dating. But has she bitten off more than she can chew?And it's all change for Humphrey and Martha as they start a newchapter in their lives, embarking on the process of becomingfoster parents.
