I can’t write properly in english but here’s the thing : Both young Emma and young Regina appear in Storybrooke and fall in love immediatly. David find them and bring them home. Fatally, Regina comes at the Charming’s place and then begins the most awkward rommate ever. The adults have to keep an eye on the teenagers and try to find how and why they are here. In parallel, everyone learn many things about the past of both Emma and Regina.