In this world alphas can turn into strong animal forms like Tigers,Lions and Wolves and Omegas can turn to weak animals like cats and rabbits.

Leo is a white wolf that means he's a really strong alpha. Omegas and alphas aren't living in the same city but they can accidentally bump into each other and visit each other's cities.

90% of the alphas killed almost all omegas that can turn into a black cats, But there's only few that had left, Leo of course wasn't part of the murders.