It's winter in Blue Lake, and Lena's wedding is only weeks away. Before she can focus on the final plans with her fiance, Sam, she must attend a much-publicized promotional event: a sleuthing competition between Camilla and three other bestselling mystery writers. The event will take place at Green Glass Manor, a mansion belonging to the wealthy Hardwick family, located just outside Blue Lake. The family estate happens to be the home of the publicist running the event, a long-time friend of Camilla's. Alexandra "Sasha" Hardwick, a publicity guru, has dreamed up the event as a way to garner new fans for her writer friends, but also as a way to make money.

Lena and Camilla brave a blizzard to take part in Sasha's mystery challenge. Camilla knows the other writers, and feels exuberant at the thought of a reunion. But when the four famous competitors come together in Green Glass Manor, they are soon snowed in, and a brutal crime has them longing to get out.