Chaewool's world shatters when his boss - and the man he's been in love with for ages - Chaeheon, unexpectedly dies. Struggling to cope, Chaewool fights to maintain his composure whilst going about daily life…until a familiar figure appears before his teary eyes. Chaeheon is back. Alive. But something is different; his memories are fragmented, his gaze unfamiliar, and his touch colder than before. What is this mysterious force lurking beneath the flawless exterior of Chaeheon? And is that…hissing I hear…?