Found

Peeta Mellark and Katniss Everdeen are lab partners, but they know nothing about the other, they never have a conversation that isn't about biology. But one day Katniss suddenly stops coming to class and as the days progress she still hasn't come to class. No one knows where she is and no one knows when she'll return. One day, Peeta sees an Amber Alert for a missing girl and when he sees the name, his whole life changes.