All Mercy wants for Christmas is answers and she'll go all the way to Germany to get them.

The Watts clan has a plan. Mercy should rest and take it easy after the attack that left her battered and bruised. After all, she solved her own kidnapping and now it's time to enjoy the holidays. She's onboard, just barely. Knowing why Anton Thooft attacked her is good, knowing who blackmailed him into it would be even better, but she can wait, or so she thinks.
Just as Mercy settles in, her father springs a plan of his own on her. She should help the FBI. Why not? It's for a good cause. Mercy's had enough of his good causes and she gets her own plan. She heads to Germany to put the final puzzle piece in the picture of her kidnapping and she's going it alone, for once.
But fate and her Grandma J have other ideas and soon it's magical Christmas markets, high school angst, and family secrets, some are even her own.
Mercy's going to learn so much she never wanted to know and just in time for Christmas.