After spending twenty years behind bars, Frank Muñoz, a disgraced former cop, is out on parole and focused on just one thing: revenge. The wife who abandoned him after his arrest, the mistress who ratted him out for abetting a money-laundering scheme, the detectives who presided over his case all those years ago--they all have targets on their backs.

For Ali Reynolds, the first Christmas without her father is riddled with grief and uncertainty. And with her husband and founding partner of High Noon Enterprises, B. Simpson, preoccupied by an upcoming New Year's trip to London, she is ready for a break. But when Stu Ramey barges into her home with grave news about a serious--and suspicious--accident on the highway to Phoenix involving B.'s car, things reach a breaking point.

At the hospital, a groggy, post-op B. insists that Ali take his place at a ransomware conference in London, as troubles brimming around High Noon come to light. But questions remain: Who would go to such lengths to cut the tech company from the picture? And what if Ali and the rest of the team are also in danger?