Jihyuk (Beta) meets Yoojoon (Alpha) again, the person that helped his brother in the past. Seeing Yoojoon suffer during his rut, in order to pay off his debt, Jihyuk spends the night with him. However, the fate that he thought would end in a day continues unwantedly, and Eunseong (Omega), who observes Jihyuk with mysterious eyes, becomes intertwined with the two… Yoojoon and Jihyuk, Eunseong and Jihyuk and even Yoojoon and Eunseong, will the knot of these terrifyingly entangled relationships ever be solved?