Yeonjun is an alien who accidentally ended up on earth. One night, a system failure occurred in his spaceship and the spaceship fell to the ground of our planet. Beomgyu ran away from home that night to go out with friends late at night, but got lost in the forest and found a strange creature.

Yeonjun was able to transform from his alien image into a human and then he noticed the young guy. Beomgyu decides to save this alien, because soon scientists will become interested in Yeonjun.