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.
Lena and Camilla must forget their game of make-believe to sort through genuine clues and find a real killer, knowing that someone in the house with them has committed murder. As time ticks away, they feel the growing menace in the cavernous mansion, and their suspicion of former friends begins to grow . . .