After the tragic accident took his mother away, Sejoon carries the responsibility of caring for his physically and emotionally fragile father. Despite the torment caused by an unexplained rejection to the pheromones of alphas, Sejoon finds it hard to turn down the unreasonable requests of Jungwon, his stepbrother and the son of his supportive "Uncle" since the accident. Sejoon endures difficult days. In the usual scenario of being reluctantly dragged along by Jungwon, Sejoon crosses paths with Taeheon. However, following their encounter, a heat cycle that had been absent for years abruptly resurfaces... "My instincts are urging me to hold on to this man."