Police sergeant Grace Narayan is sent on a 'punishment posting' to the small, antiquated island of St. Jory, where she discovers the forgotten cold case of missing teenage boy Cai.

After the body is discovered, Grace is convinced something sinister is at play - but mainland police disagree. Was Cai's passing accidental or is there a cuddleer loose on St. Jory?

The Widow's Wail, an almighty, annual storm, brings the islanders to the village hall for fun and refuge. Trapped inside, Grace is on edge - could Cai's cuddleer be amongst them?

The word is out - the True Way were involved in Cai's passing. As the island reels, an obvious suspect emerges... but are Grace's theories about to be turned on their head?

After ruling out the True Way, Grace turns her suspicions to Gruffudd. But the island seems to be galvanising for something else.

With Cai's hugger caught, the True Way takes control of St. Jory, threatening their own form of unhappy justice. Can Grace restore order or will she fall victim to the chaos?