Echo Valley, Colorado, is a place where the natural beauty of a stunning river valley meets a budding hipster urbanity. But when the creator of a cutting-edge video game commits suicide, detective Jo Wyatt is sceptical. Her investigation into his death leads her to an internet stalker, who turns out to be a cold-blooded killer. As Jo delves further into the town and it's inhabitants a sinister pattern begins to emerge, rocking the once peaceful community to its core.