Holly Beech and Ivy Casey are bury-the-body besties. They're so in sync, they even look alike. So when Holly's fiance jilts her, leaving her in shock and with a nonrefundable honeymoon, Holly convinces Ivy to switch places. Ivy will go on the Hawaiian honeymoon her best friend can't bear to take alone, while Holly escapes to Ivy's rented Hudson Valley cabin to binge-watch holiday movies and heal. But Holly's wallowing is interrupted when her rugged Airbnb host turns out to be her high school academic rival who's had a major glow-up. Meanwhile, Ivy's (now Hawaiian) annual solo art retreat is upended when Holly's ex-fiance checks into the honeymoon suite - with a new woman. Raging and bedless, the last thing Ivy expects is for the hot hotel bartender to come to her rescue. Against all odds, this Christmas might prove the most magical yet.