Mark Lee's Little Sister | Jisung Park

Mark Lee has been involved with Dream, a gang/mafia that are very well-known in Seoul, South Korea. He befriended the members and even became the boss of the gang until he betrayed them and gave all the information he knew about Dream to NCT, an advanced form of an FBI/police force. Dream have sworn revenge towards Mark because of what he doe to them. But what no one knew, Dani, (Mark's little sister) is actually a street fighter. And while Mark was away, and Dream were on the run, they came across Dani. Her and Jisung falling for one another even though they were both fairly cold to one another. What will win? Love or family?