When a dangerous nest of vampires led by an old friend of Lem's arrives in Midnight, Manfred and Olivia join forces to discover their true intentions.

The Midnighters band together to stop an ancient succubus who seduces and devours men, and Olivia discovers an unwelcome connection to her past while carrying out a hit.

Manfred turns to Olivia for help when his dark past finally catches up to him, and Bobo must confront his own troubled history after the Sons of Lucifer kidnap Fiji.

When a local girl goes missing, the Midnighters try to find her before law enforcement descends into town. Manfred and Creek discover Aubrey's murder was not an isolated incident -- someone or something is killing young women in Midnight. In the race to find the missing girl, Bobo resolves to get justice for Aubrey. Lem and Olivia join the hunt, not knowing if the killer is human or supernatural. Complicating matters, Fiji is haunted by a demonic entity and seeks answers from the Rev while Joe struggles to maintain the secret that protects his family.

A bounty hunter from Joe's past arrives in Midnight to punish him for leaving the angelic fold. Manfred takes charge with a plan to lead Fiji, Olivia, Bobo and Lem in an effort to stop this dangerous, nearly immortal foe from killing Joe and Chuy, as well as destroying Midnight. Meanwhile, Creek struggles to recover from her family tragedy. Elsewhere, the Rev refuses to compromise the safety of his neighbors and it costs him dearly.

A faceless supernatural makes a pilgrimage to Midnight to usher in the arrival of a demon from the veil to Hell - the same demon that has been plaguing Fiji. Meanwhile, the Midnighters struggle to fight the effects of the veil to Hell opening in their town, especially Lem and the Rev, whose hunger increases to dangerous levels. Olivia and Bobo make plans of their own to protect the town. Elsewhere, Creek struggles in the face of great loss as Manfred confronts his constant self-medicating.

An apocalyptic sandstorm engulfs Midnight concealing wraith-like demonic spirits heralding the arrival of a demon from Hell. Fiji knows this demon wants her and Bobo vows to protect her, while wondering why the demon has targeted Fiji and no one else. Manfred, Joe and the Rev dig for answers from the past, but when the storm gets too dangerous, Manfred leads the Midnighters to an unlikely hiding spot outside of town. Olivia confronts Lem about their relationship, and Creek helps Manfred when he needs it most.

With Hell literally about to erupt onto Witch Light Road, and Fiji about to be claimed by the Demon who has been tormenting her, Manfred leads the Midnighters to take back their home from the evil forces that occupy it. As Bobo turns his attention to saving Fiji, Olivia and Creek confront the wraiths. Manfred focuses on killing the demon and closing the veil with the help of Lem, Joe, and the Rev. Manfred takes a desperate gamble and risks his life by asking for help from an unlikely source.