بچه‌هایی با قدرت‌های فوق بشری که در خفا زندگی می‌کنند همراه با والدین‌شان که با اسرار دردآور گذشته سر می‌کنند، در کنار هم با خطرات عظیمی روبرو می‌شوند.

Stuntman Cha Dal-geon gets involved in a tragic airplane crash and ends up discovering a national corruption scandal in the process. Go Hae-ri, the oldest daughter of a deceased marine, decides to work for the National Intelligence Service as a secret ops agent in order to support her mom and younger siblings, although all she wanted to do is to become a civil servant.

کانگ این‌گو (ها جونگ‌وو) تجارت خود را در کشور سورینام آمریکای جنوبی آغاز می‌کند. او در موقعیتی قرار می‌گیرد که باید با سرويس اطلاعات ملی (NIS) کره جنوبی برای دستگیری جئون یو‌هوان (هوانگ جونگ‌مین) همکاری کند. او به‌عنوان یک پادشاه مواد مخدر شناخته می‌شود که عملیات قاچاق مواد مخدر خود را از طریق سورینام انجام می‌دهد.

After his mother is brutally murdered by the Triad in Thailand, Soo-hyun is adopted by NIS agent Kang Joong-ho, and he grows up with Min-ki like brothers. Min-ki and Soo-hyun both become NIS agents later on. One fateful day, Soo-hyun meets Ji-woo after last seeing her in Thailand when he was a child. They start dating. One day, Soo-hyun ruins a mission when the suppressed memories of the day his mother died surfaces in his mind. NIS Director Jung gives Soo-hyun an undercover assignment to infiltrate the Triad and Soo-hyun takes the job. Soo-hyun fakes his death and assumes a new identity to become a member of the Triad. With his fake identity and new name, he prowls the back alleys of Bangkok.

Han Ji-hyuk, an NIS agent gone MIA, returns after one year to join a new team as he searches for his lost past.