The Choi family returns to Seoul to get revenge for their parents murder, no matter who they have to hurt to avenge them. But, what happens when Siwon falls in love with the daughter of the murderer, Im Yoona? Will he give up everything for her? Or will he use her to get what he wants?
 

Main Characters:

Choi Siwon: 22

He's the oldest of the Choi siblings and wants to get revenge for his parents. He witnessed their murder and now he wants to avenge them. Falls in love with Yoona.

Im Yoona: 22

Cheerful and kind. Even though she's very shy, she's one of the most popular girls in the university.  Her best friends are Ok Taecyeon and Jung Jessica. Falls in love with Siwon.

Choi Sooyoung: 20

Sooyoung: She is the second of the Choi siblings. She was still very young when her parents died but she still wants to avenge them. She wants to leave Seoul when they finish everything. Falls in love with their obnoxiouos and clumsy neighbour, Lee jinki.  FaF

Choi Minho: 19

He is the third of the Choi siblings. He is not sure about their revenge because he doesn't want anyone to get hurt. He's caring and charming and lots of girls like him  but he falls in love with Seohyun.

Choi Sulli: 16

The youngest of the Choi. She is aware of the revenge but doesn't care too much, she just wants a normal life in Seoul after everything finishes. She falls in love with Lee Taemin but he doesn't return her feelings and thinks she is a stalker.

Jung Jessica: 22

She's Yoona's best friend and works as a waitress on one of the Im's restaurants to mantain her and her sister, Krystal after their parents death. She is in love with her bestfriend Donghae but she won't admit it because she is aware of her sister feelings towards him. 

Lee Donghae: 22

Taemin's hyung and Jessica's best friend. He tries to help the Jung family as much as he can because he has been in love with Sica since they were young but he thinks she doesn't feel the same way.

Minor characters:

Seohyun: 19

Cho Kyuhyun: 20

Lee Taemin: 17

Ok Taecyeon: 22

Kim Taeyeon: 22

Lee jinki: 21

Kwon Yuri: 22

Nichkhun Horvejkul: 22

Hangkyung: 22

Yesung: 21

Micky Yoochun: 23

Max Changmin: 22

There will be other minor characters.