Sulli and Minho are secret agents. They have known each other since kids. They both work for S.A.C. (Secret Agentcy Company).
In one of there missions some thing went wrong that made Sulli lost her memory and get kicked out of S.A.C. Minho wasn't in that mission so he didn't know that Sulli lost her memory. When he finds out, he started searching and finds out what made Sulli loose her memory was not an acident it was planned. Sulli for some reason gets back in S.A.C. but still doesn't remember anything. 

In this FanFic Sulli and Minho are searching for Sullis memory and who and why planned to erase Sullis memory. Along the way they get into lots of trouble and adventures. Will they find the person who planned all this or will they find the love they have for each other???