Seven teenagers ~~

• Choi Junhong
• Jung Soojung
• Lee Taemin
• Son Naeun
• Jung Daehyun
• Jung Eunji
• Bae Suzy

One organisation ~~

• S.O.S. - Secret Organisation of Spies

Thousands of enemies ~~

Together, can the seven of them protect the world during the night and keep it a secret during the day?

Will it help that they have no idea who one another are? They're not allowed to communicate with each other except when on a mission and aren't allowed to switch contact information of ANY kind.

What happens when they meet by chance one day? Somewhere, no other than just a school camp?

But when a yacht party goes wrong, the seven of them are thrown out to see and end up on a massive deserted island...or is it not deserted?

Something is incredibly strange with the island, more namely, the heart of it.

And who are those seven spirits? There's one for each colour of the rainbow...