Yassin survives the plane crash, Sameh, Shorouk, and Nihal are released after being detained in the hospital, and the injured begin to exhibit aggressive behavior toward humans.
Yassin warns the world during a live broadcast of a new epidemic, while everyone is lying, while the disease begins to spread and symptoms of madness appear in the cases.
The rates of infection with the new virus and suicide cases increase, and things get out of control on a plane that Yassin is traveling on, crashing with passengers.
Yassin exposes Saad, who tries to escape with the serum outside Egypt. Sami's therapeutic experiment on his mother fails and she dies, and Yassin and the rest try to hide inside the pharmaceutical company.
Yassin doubts the new vaccine for the virus, Saad is killed by an unknown person, it becomes clear that Iman killed her husband, Hamza, Alia's baby, dies, and one of the infected people attacks Sameh.
Karim kills his father, Ezzat, and things get out of control inside the hospital as the infected escape from the quarantine, and Saif discovers Salah's connection to the beginning of the disease.
Sameh is arrested, and in a flashback, Yassin remembers that he caused the death of his son Ali. In the present, Yassin and Rami, led by Sameh, succeed in reaching Laboratory C.
Yassin discovers that the virus mutates and is transmitted through infected people biting victims. Things get out of control in the hospital with the spread of the walking dead. Saif and Rami succeed in obtaining fuel and returning to the hospital.
Shorouk is found murdered, and Rami tells Yassin about his past and why he caused his wife's suicide. Sameh flees after Yassin and Rami discover his involvement in manufacturing the Covid-25 virus and his killing of Shorouk.