In 3653 BBY, two Force-sensitive siblings are torn from their home and raised by the Sith. Ten years later, Lyra begins to question the darkness she was taught to embrace when a Jedi reveals a path toward the light. But as Lyra searches for a way out, her brother Kaelin gives himself fully to the dark side. When their paths collide, Lyra is forced to confront the brother she once knew, as an ancient darkness begins to awaken.