In the 4th new season, nine months will have passed since the events of Season 3, with the vampiric strigoi in command of the despairing world as they finally roam the world in daylight after being triggered by an apocalyptic nuclear event. Mankind will be subservient to the Master and his "Partnership" which dominates the human race, but there's still hope that the disbanded heroes of seasons past can overcome their personal hardships to save themselves and each other from these creepy beings.