Janie is tasked with solving the murder of divisive best man Gethin Bennion the night before a wedding. What initially seems to be a burglary gone wrong quickly unravels complicated family dynamics and betrayed friendships, revealing just how far people will go for love. Janie is forced to face up to her personal experience of a friendship turned sour in order to connect with a suspect and crack the case. Meanwhile, John forms an unlikely connection with one of the suspects over art and painting, forcing him to re-evaluate the role that work played in his own marriage and the circumstances around his late wife's passing.

A murder mystery event turns into a real murder investigation when famous Welsh actor and TV detective Anthony Hart is found stabbed to death at the dinner table. There's a lot of pressure on Janie to solve this murder, which isn't helped by the fact that John is close friends with Helena Hart, the sister of the deceased. John and Janie's investigation reveals not only a feud between siblings warring over property and their family's legacy, but also the pitfalls of fame and the kind of person Anthony really was. John finds himself rekindling his fledgling romance with old flame Helena, but ultimately, it's through an unexpected connection with a suspect that he is reminded of the dangers of living in the past, which inadvertently helps Janie let go of her own baggage. For Janie, this case is also the final hurdle before landing her DI position.