One of Gyuwon 's old colleague (Chuck) came to find him in order to ask Gyuwon to help delivery some drugs illegally in Korea. Gyuwon decilined the offer, therefore Chuck want to force Gyuwon to join by threaten Hwayoung (by selling all Hwayoung's private information for other's rival of the Yoon family).
Gyuwon therefore broke up with Hwayoung to join the delivery and he doesnt want Hwayound to involve in his business since his old colleague is someone dangerous (involved with yakuza and other bad guys from forgeiners).
Hwayoung became a mess since he didnt know why Gyuwon did that. After a while Hwayoung cameback to his sense, he knew that his family (Yoon family) also invloved in this and knew something => Hwayound rushed to his family house and earproof the situation then he knew Gyuwon broke up with him due to his safety.
Thank you
Guys can someone explain what's going on