Summary
Seohwa joins the country’s leading mattress firm and learns its CEO, Cheolsu Gam, is a centuries-old demon cursed with eternal sleeplessness. He believes she is the fated human who can finally grant him rest, allowing his return to the demon realm. A strictly professional relationship soon deepens into something more, but when Seohwa begins suffering from sudden insomnia, their intertwined destinies are thrown into uncertainty. Will he achieve his long-awaited freedom, or will their growing bond unravel it all?