It had been a few weeks after Petra had died. Levi hadn't been the same person ever since that day and seemed even colder. One day, when he was sitting in his office, a knock came from the door. Footsteps could be heard, so the person who knocked walked away right away, but something was placed in front of the door. Levi stood up. He didn't want to open but he had to. He opened the door and looked around. A baby was lying in a basket on the ground. It was asleep and the basket had a note attached to it. This is what the note said: Dear Corporal, Excuse us for bothering you with a child since you're so busy, but this child is yours. We found it and retrieved it to you, so we hope you will raise it well.

(This takes place after the Return to Shiganshina arc in the manga, so there will be major spoilers) Though it has been many months since the deaths of the old members of the Special Operations Squad, there is still something that will always remain empty in Captain Levi's heart. Something Petra Ral could only fill. Levi keeps telling himself that he has to move forward, but for some reason, he cannot. And to make things worse, Levi knows that Petra will be gone forevers. However, after eavesdropping on a conversation between the new commander of the Survey Corps, the titan-lover Hange Zoe, he partially hears about an action that the now deceased Commander Erwin carried to his grave. Though Levi doesn't believe it at first, the action is soon confirmed on an expedition, where the Survey Corps witness Titans being killed by an unknown stranger. But they will be shocked upon finding out that the stranger is none other than the long-lost, thought-to-be-deceased Petra Ral. Petra is warmly and tearfully welcomed back, but what will happen when something escalates between Levi and the revived soldier?