Seowon, who has lived his entire life as an ordinary Beta, is suddenly hit by the traumatic shock of an Omega sub-gender revelation, immediately followed by a desperate Heat Cycle.

In a moment of instinct and loss of control, he ends up spending a night with Yohan, the son of his step-brother.

Seowon desperately tries to bury the "accident," but Yohan, the younger man who has always hidden his true feelings, begins to unveil a terrifying, simmering obsession.

"Uncle, I love you."

Can Seowon escape the inescapable bond forged in a single night, or will Yohan's pure, relentless love finally save them both?