A body in a wine cask, a missing heir, and a deadly secret waiting to be uncorked . . .

Canine rehabilitator Maddie "Mad Girl" Whitney, still reeling from a recent breakup, struggles to hold her life together as her once-lonely world expands with friends, family, and new staff complicating her every move. Fortunately, her loyal pack of incredible dogs is always by her side. But when she stumbles upon a body sealed in a cask, Maddie is drawn into the high-stakes world of wealthy wine collectors and secrets worth killing for.

The intrigue deepens when two connoisseurs vanish on a hike. Maddie must make the heart-wrenching decision to reunite with her ex, Sheriff Oliver Desjardins, and the Midnight Runners K-9 Search & Rescue Team. Working side by side, Maddie and Oliver navigate the case's dark twists and their own unresolved emotions. As the mystery unfolds, Maddie realizes the danger runs far deeper than she imagined. Is a "Cabernet Killer" on the loose?

In wine country, there are secrets people will do anything to protect—even if it means more bodies in the cellar.