From the earliest recorded ages, the time leaper, Christina, exacts revenge on villains who would do her or the ones she loves harm by using her intellect and skills she's developed throughout her lifetimes.
Today, the FBI analyst, Magnus Larzon, uncovers not cold but frozen homicidal cases. As Magnus begins to unravel Christina's story from Zeus's Hellenic Wars to the current Ukraine War, he begins to realize he is either tracking down a cold-blooded murderer or the love of his life.