Worried that Jake was the intended victim, Jenna makes a list of suspects and checks it twice. Swapping her Santa's hat for a sleuthing cap, she gets busy investigating Jake's long-lost sister, his Grinch of a neighbor, and a stamp collector who covets Jake's most treasured piece. When Jake himself is poisoned and nearly dies, Jenna knows she'll have to do whatever it takes to corner the culprit before it's lights out for Jake . . .