Adjusting to life in Bath, DCI McDonald and partner, DS Dodds, are called to the Mara Retreat, a private rehabilitation clinic, to investigate the mysterious death of a wealthy patient. But they are immediately thrown into a world of smoke and mirrors as they navigate the complex and sensitive issues of her remaining tight-knit therapy group, forcing McDonald to use clandestine methods to get closer to the truth. As they dig deeper, they discover a plethora of lies, murder, betrayal and a hidden ruse to secure fortune and freedom, but at what price?