Eren Jaeger and Mikasa Ackerman live inside a 50 metre tall wall with lots of people and their friend Armin Arlert. Titans threaten to erase humanity but the biggest threat is the colossal titan who can kick a whole in the wall and let the other titans in. Mikasa loves Eren but can't tell him and Eren has not yet realised how he feels... does he like her or not?