The team jump into action when Niamh Kirby is found with an arrow on her back.
She survives but DI Humphrey Goodman believes Niamh is a troubled woman. She is in early stages of dementia even though she is relatively young.
Her husband Lewis went missing some years ago and Niamh believed that her brother in law Patrick killed him. The police investigated but there was no proof.
Patrick claimed that his brother was unhappy in his marriage and went off grid. Now living in America.
There was also a dispute over Patrick's plan to develop some land for a hotel which angered environmental activists.
If Patrick was a suspect in trying to shoot his sister in law with a bow and arrow, he has a watertight alibi.
Nothing straight about this story. A hissable baddie who is quickly out of the equation. With no other plausible suspect, the story could only go one way.
I did find the story did get messy. Why did no one check with US Immigration about Lewis Kirby's whereabouts. You cannot just go to America and decide to just settle there.