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 stake out 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. 

The hunt heats up and Mary and John find trails that lead back to their fathers; Carlos helps Mary investigate where the Akrida might be hiding, but they discover more than they bargained for; Millie steps in to help decipher notes left behind. 

Mary and John stay close to home to watch over a newly returned Samuel Campbell; when Latika and Carlos split off to investigate the death of a musician, Carlos is forced to face a part of his past he has been avoiding. 

When vampires make their way into Lawrence, Carlos corrals the gang to find out why; John gets a scary glimpse into the future; Mary struggles with the tedious balance between feelings and action when it comes to John. 

While Carlos talks through a problem in his personal life, it gives Latika a new idea about how to find the Akrida queen; Millie's new security system for the clubhouse proves helpful when Mary and John find an unexpected guest inside. 

In the aftermath of the fight with Golem, Carlos, Mary and Latika are shocked to see John standing before them, covered in blood; Carlos and Latika set out in search of something important. 

Mary and John's tense discussion is interrupted when Carlos and Latika arrive to discuss a mystery involving a creepy clown; Ada makes an interesting discovery. 

John receives a message from a mysterious stranger; Carlos, Latika and Ada work together to find answers, but time is running out; Mary and John have a warm, but awkward, reunion.