The one-of-a-kind prototype of Holo falls into Han So-yeon's solitary life, eager to help with anything she needs — if she will allow him.

Seeing she has a crush on her co-worker, Holo offers to be So-yeon's dating coach. Ko Nan-do monitors their growing bond from his lab.

Nan-do moves in next door to So-yeon, convinced that being with her has broken Holo, and determined to do whatever it takes to fix him.

Conflicted about her feelings, So-yeon tries to distance herself from Holo. Baek Chan-sung sends his men after her glasses.