As Valentine's Day approaches, love is in the air with April Claus's friend, Claire, getting married to Jake Frost-but when a cold-blooded killer strikes, it sends shivers through Santaland . . . It's the wedding of the winter-Claire and Jake-and April and Juniper will be bridesmaids. Everyone's feeling the love. Even the reindeer who pull April's sleigh are feeling the Valentine's vibes: both Wobbler and Cannonball fancy Flouncy, a doe from the Vixen herd. As for April, of course she couldn't be happier being married to Nick (aka THE Santa Claus), but now that they're no longer newlyweds, has their romance been a bit backburnered? As the bridal party assembles at the Order of Elven Seamstresses for a fitting, Juniper's new boyfriend, Sterling Redwinkle, stops by with a corsage. While he's pinning it on Juniper, he's pricked by a rose thorn and collapses. Though he's rushed to the Santaland infirmary, he dies within hours. It turns out the thorns were covered in deadly poison. But who was the killer's target-sweet Sterling or the now heartbroken bridesmaid? With Ivy the florist immediately the chief suspect-even being called "Poison Ivy" by naughty gossipers-it's up to Mrs. Claus to uncover the North Pole poisoner in time to salvage Claire and Jake's wedding at Castle Kringle . . .