The world of humans trembles under the crushing might of the Titans. Sacrificing their freedom, humanity has taken refuge within walled cities, hoping to protect the survivors. However, the Titans managed to breach the wall once again and invade the city. Many perished in the fight against the monsters, including Mikasa’s best friend, Eren. Shaken by the news of his death, Mikasa loses her vigilance and finds herself in mortal danger, but she is suddenly rescued by a mysterious Titan that only attacks other Titans. Who is this enigmatic savior?