Mervin and the team have quite the mystery on their hands when a game show contestant is stabbed during filming of the series's grand finale. In a baffling turn of events, the victim is murdered in midair whilst hurtling down a zip line. As various members of the TV crew come under suspicion, Mervin surprises his colleagues by signing a contract to prolong his stay on Saint Marie. But he and Selwyn butt heads when it becomes clear Mervin has an ulterior motive for extending his visit. And it turns out that Selwyn has secrets of his own...
