I An is stuck in the past while trying to stop an alien prisoner from escaping a human body. After many obstacles, she finds a new weapon that can open a time door and saves Thunder. Meanwhile, Mu Reuk is confused by a strange presence inside him. Other characters, such as Heuk Seol, Cheong Un, and Neung Pa, are also involved in the search for a divine sword. Ja Jang starts chasing I An and Mu Reuk.
Many people are dying from an alien substance called Hava, and Min Gae In realizes this is just the beginning. With limited time left, I An opens the time gate and returns to the present with Mu Reuk, Thunder, and two immortals. They must fight the aliens, stop Hava from exploding, and save the people.
(Source: Korean = Namu-Wiki || Translation = MyDramaList)
