A mysterious mansion suspended between earth and sky becomes the stage for an impossible confrontation. When a spectral entity known as the Sky Ghost emerges from the clouds, reality itself begins to fracture around the sprawling estate. The apparition isn't malevolent in any conventional sense, but its very presence warps the laws of nature, drawing attention from something far older and more dangerous lurking beneath: Jormungandr, a primordial force awakening to the ghost's disturbance. Residents trapped within the house find themselves caught between two incomprehensible beings, each representing different aspects of cosmic horror. As day transforms into an endless twilight, they must piece together the connection binding the Sky Ghost and the ancient serpent, discovering that this encounter may have been written into fate long before their arrival. The atmosphere oscillates between intimate character drama and vast, incomprehensible dread. Secrets hidden within the mansion's walls gradually reveal why these two forces were destined to collide. By the film's end, viewers confront the unsettling possibility that humanity might be merely an afterthought in a struggle between entities operating on scales we cannot fully comprehend.