Hoping to restore Holo, So Yun sets out to jog his missing memories — and discovers a history with Nan Do that she hadn't figured out yet.

No one understands exactly how Holo came back. As the lab prepares to make the product public, Nan Do hands So Yun the eyeglasses for good.

Faced with little choice, Nan Do hands over his lab to its rival company. So Yun meets the new Holo, who feels like a stranger.