You (Hinata) were outside at night near the waterfall dipping in your feet in the nice cool water and taking a moment to calm down.

The Akautski was after you to study more about the Byakugan, so they thought why not take the Byakugan princes insdead. Sasuke was part of the akautski and he saw you, he picked you up and carried you away into the forest taking you to their base.