A young lady from Busan live a life as a secret agent . She working in one of Korea most famous agency and this is her first mission ever . Her life is way more different than others would ever think . To complete this mission ! She must also sacrifice something from herself . This is also mean that one wrong step everything can be ruin . "As much as I want to stay , it's time for me to go" "Being a spy is difficult, but loving you is even worse" "If we're really meant to be ! Nothing can change us from loving each other right" ~ Jennie Kim