Bo-Nui (Hwang Jung-Eum) works various part-time jobs to support herself and pay her younger sister's, Bo-Ra (Kim Ji-Min), hospital bills.
Her younger sister has been in a coma for the past 2 years because of a car accident.
Bo-Ra is also Bo-Nui's only immediate family member as their parents died in a separate car accident.
Bo-Nui is a firm believer in fortune tellers after an encounter when her younger sister was first hospitalised.
At that time, Bo-Nui was standing right outside of the hospital and crying. The fortune teller knew all about her situation without Bo-Nui saying anything.
He told her that those around her were all hurt because of her fate.
The fortune teller also told Bo-Nui that if she wanted to save her sister she must perform a specific ritual.
After performing the ritual, Bo-Nui went back to the hospital and learned her sister has survived, but she is in a vegetative state. The fortune teller tells Bo-Nui that there's only one thing that can save her sister.
Now, Bo-Ra's condition has worsened and the doctor tells Bo-Nui to give up hope for a recovery. Bo-Nui must have a one night stand with a man born in 1986 - the year of the tiger.
Meanwhile, Soo-Ho (Ryoo Joon-Yeol) is the CEO of Zeze Game Company. On the day he is to give a presentation for a new game, he continually bumps into Bo-Nui in unpleasant ways.
Soo-Ho's presentation turns into a complete failure due to trauma from his childhood past and bad code intentionally placed into the game.
Later, Soo-Ho again sees Bo-Nui's out in the public, but she is drunk.