After going bankrupt because of her brother, Ara-Ji lived a horrible life, working as a barista just to pay for her basic needs. One day, while in the subway, she encounters a strange man, offering her money if she plays a set of children's games. Ara-Ji accepts the offer, but can't shake the feeling that there is something wrong... This story is inspired by "Squid game". Original Netflix series made by Hwang Dong-Hyuk.