With no word from Simon, whom they know is still alive, so Peter throws himself into the role of surrogate father to his nephew, Daniel. The baby has moved in with his mother, Honor.
The local branch of the Women's Institute are keen to save a lighthouse by petitioning the Trinity House Lighthouse Authority. When their efforts return only a no, they turn to Peter for help. It appears someone is sabotaging the attempt and Peter uncovers the dark secret of two sisters who have an historic association with the lighthouse.
Another case brings Lyle and Peter face to face with two brothers who both want to use their late father's burger van patch. The argument often gets violent so it is Peter and Lyle's task to resolve the task peacefully.
Beatrice and Peter are made god parents to Daniel, and happily put him to bed at home. But something draws their attention to the the sitting room, where they are met with a surprise.