Fortune City is a colorful urban jungle flowing with endless streams of lively citizens. Among the millions is Leon Zylo, a simple man with few goals and ambitions who follows the same dreadful routine day after day. Then, his life takes a drastic turn when he becomes a contracted target of the mysterious Baya hunters. These rambunctious killers live to reap the Souls of their bounties, and they never fail. Leon realizes that in order to continue his existence, he must become a hunter himself, and begin taking the lives of others.