Ava Winters is young, beautiful, and the heiress to Napa's prized Starling Vineyards. She is also in love with the perfect guy at least that's what she thinks until he helps take everything that was once hers. With no place left to turn, Ava finds herself on Rebun Island, Japan, the site of Takeda's revenge school, where she trains to be mentally and physically strong enough to take revenge. On the island, Ava meets Emily Thorne, who has recently returned to training with Takeda. Emily shares her wisdom with Ava about revenge and the importance of looking for justice in a world where enemies thrive. Four others are on the island preparing for their own personal vengeance—a handsome but guarded man, a feisty young woman and the guy who will do anything to protect her, and a girl who has no memory or idea of who she is or why she's on Rebun. Conflicts arise, bonds are formed, and romance even blooms. The trainees learn that their missions are intertwined. All roads lead back to Ava's home in Napa and Starling Vineyards' annual gala, and if the group attends, each will gain the chance to exact revenge. But to get there on time, they must leave Japan and Takeda before their training is complete. Are they ready? Will they succeed? Will they even survive?