When John returns home from fighting in Vietnam, a mysterious encounter sparks a new mission to trace his father's past; John crosses paths with demon hunter Mary, who is also searching for answers after the disappearance of her own father.

John and Millie are on different pages about his new interest in hunting and Ada tries to bridge the gap; Mary follows a trail from her father that points to the disappearance of a teenage boy.

When Mary's next-door neighbour mysteriously goes missing, she and John start digging into the disappearance; Carlos and Ada bond as they stakeout a potential lead for the demon's partner.

After the details of a veteran's death don't add up, Carlos brings everyone in to investigate; Mary finds an unexpected ally; Latika tries to help Mary heal and find closure with someone she lost; Millie is worried about her son.

Hidden secrets from Ada's past comes to light when the gang goes under cover to look into a suspicious death; Millie asks Mary to keep an eye on John as they split off from the others to get intel on the new case.

Mary gets a call from an old family friend who's looking for some help, but when the team arrives, they learn that some crucial details were left out; Latika struggles with being a hunter; John's eagerness, and commitment to the hunt worries Mary.