the story will be about Hades Posidon and Zues the Greek Gods, whose children are:

Hades son's: EXO

Zues's son: Lee Jong Suk 

Poseidon's children: Shim Ha Chan(OC) and Big Bang

The plot is that Hades kidnaps Shim Ha Chan and tries to force her to marry one of Exo's members. She was supposed to marry Lee Jong Suk since they loved each other. Therefore......................