Centuries of shadows and silenced threats define the existence of a ruthless hitmen clan, their legacy carved in blood and secret contracts. But now, a different kind of deadline looms, one that threatens to unravel their entire *lineage*. A chilling ultimatum hangs in the air: produce an *heir*, or face an unthinkable, horrific consequence that could erase their very name from history. The weight of this *survival* rests on shoulders least prepared for it.

Meet Gero, a young man raised only in the "dark side of the business," convinced he has zero *prospects* in love, that *marriage* just isn't for him. He’s a natural killer, not a husband. Yet, when his clan presents their horrifying demand – force his innocent little sister into "that" if he fails – Gero hits his absolute wits' end. His only desperate solution? He asks his current target, a notorious *marriage swindler*, to... help him tie the knot. Can this deadly *contract* lead to anything but disaster?