It had been 20 days since the zombie infection spread throughout Korea and nearby cities. You lived in an apartment in a large building, where you were the only survivor. You were alone, you thought you were the only one, and you were barely surviving. The food was running out, and so was the water. You were losing your patience, totally, as well as your sanity.

What you didn't know was that, in the building across from yours, in an apartment that was right across from yours, lived another survivor: Yeonjun. He was coping fairly well, carefully managing his food and having made several traps to defend himself. He was always cautious. What you didn't know was that he noticed your presence in your apartment, every movement, every action of yours, he watched everything through his binoculars, he was well informed about your life.

One morning, while you were desperate because you had run out of food, you leaned against the railing of your apartment's balcony, frustrated. Yeonjun was sitting on the floor, watching you through his window with his binoculars, noticing your anger.

Although he didn't want to take any chances, Yeonjun decided that it might be a good idea to contact you to gain more support until they could pick him up. So, he slowly opened his window, and also walked out to the balcony, once you noticed him, he waved his hand to greet you, slowly.