Not every murder is what it seems.

The cause of death was obvious: a small puncture at the base of the skull. Newly-minted KGB agent Polina Tolkonova knew this was not a random murder in a locked room but instead, a planned assassination by someone with expert killing skills. Polina’s arrival at the renovated Romanian castle during a frigid blizzard was only the start of her troubles; before the day was over, she would face another murder and a collection of suspects, some of whom were international spies like herself. One thing Polina knew for certain: she must find the killer before she became the next victim.