Sloane Harrington is the black sheep of her family and hasn't been home in years. But when her stepmother dies and the four Harrington siblings prepare to sell the family estate, Sloane's brother David convinces her to come back for one last reunion in their childhood home. After arriving, Sloane becomes suspicious of her stepsiblings: are they trying to kill her and David to avoid splitting the inheritance four ways?

When a mysterious key and a holiday riddle arrive on their doorsteps, Kate and Kevin embark on a Christmas romance adventure they’ll never forget.