When John returns homefrom fighting in Vietnam, a mysterious encounter sparks a newmission to trace his father's past. In his journey, he crossespaths with 19-year-old demon hunter Mary, who is alsosearching for answers after the disappearance of her ownfather. Together, the two join forces with younghunter-in-training Latika and easygoing hunter Carlos touncover the hidden truths about both their families. Theirinvestigation leads them to a rare book emporium, whose ownerAda takes an interest to the occult and could provide themissing pieces to their puzzle. But secrets run deep for boththe Winchesters and Campbells, and despite the best efforts ofJohn's mother Millie to protect her son from pursuing adangerous life of demon hunting, John and Mary are bothdetermined to work together to uphold their families' legacieswhile beginning to form a family of their own.
