Complete story — includes the ending
Hannes sacrifices himself protecting Eren and Mikasa from the Smiling Titan. Eren breaks down, unable to transform to help, but Mikasa inspires him to keep trying. Eren activates an unknown power within him, as when he roars a battle cry, the Titans leave the Scouts alone and go devour the Smiling Titan. This makes Ymir realize that Reiner and Bertholdt want Eren because he possesses the Coordinate, the ability to control other Titans. The surviving Scouts escape after Eren causes the Titans to go after the Armored Titan next. Ymir leaves Historia to save Reiner and Bertholdt. A week later, Hange and Conny give a report to Erwin, healing from losing his arm, Levi, and Dot Pyxis that reveals that the Titans that appeared in Wall Rose were the citizens of Ragako, meaning that Titans are, in fact, humans. Remembering how many died to rescue him, Eren vows to use his new power to help humanity. Meanwhile, the Beast Titan looks out from atop Wall Maria, as a mysterious man emerges from its back, declaring "not just yet".
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Attack on Titan season 2. Reference markers and HTML formatting removed. · Content license