"Listen. If you're ever in danger, scream 'Ko Ko Bop' and someone I know will save you.”

Velica is an amateur writer. She has no memory of when she was sixteen and seventeen years old; she had woken up in a hospital after a car crash. Well that's what they told her. She now lives with Baekhyun, her friend that has no filter and gains easy money, in Paris. She doesn't know how he gets the money until one night where she meets in an odd way an infamous gang, EXO.

At the same time, the EXOPLANET gang burglarize rich places. They're notorious, infamous, whatever you want; they're known and no one messes with them. They're coming to Paris to fetch one of them and meet in an unusual way a certain girl, Alice.

How do these two stories collide ?