Seventeen-year-old adolescence Woo Min is on his own and lives with Soo Jeong who used to be his parents' caregiver. Woo Min secretly grows fond of Soo Jeong who can't speak but finds out she's sick and feels the urge to protect her... However, as a poor minor, there's nothing he can do let alone pay her medical bills. One hot season, Woo Min sets off for a cruel world to save her.

Prince Lee Hwan receives a cursed letter from a supernatural entity detailing several dark predictions for his future and is horrified to realize that the curses are indeed coming true one by one. Min Jae-yi, on the other hand, finds herself wanted by the local authorities after being unjustly accused of murdering her family members and unilaterally calling off her arranged marriage.

曾担任特种部队军官的金道奇（李帝勋 饰）因母亲遭谋杀而失去至亲，深受打击。在他人生最低谷时，遇见了“彩虹运输”的代表理事张省哲（金义城 饰）。这家公司表面经营高级出租车服务，实则是一家通过私刑为受害者伸张正义的秘密组织。“彩虹运输”的司机均由秘密特工担任，专门惩治那些逃脱法律制裁的罪犯。此后，在一次行动中，团队接触到一家高利贷集团，并意识到这可能成为他们迄今最大的挑战。他们进一步发现该犯罪集团与国际人口贩运组织关系密切，这些追寻正义的人决定将任务延伸至海外，试图彻底摧毁这一犯罪集团的核心势力