In the city of Huanhai, Xia Dongqing and Ya run the 444 Convenience Store, a shop that bridges day and night. They are joined by a new partner—the mysterious “Night Watcher,” who bears an uncanny resemblance to the missing Zhao Li—and together they safeguard the fragile balance between the human world and the spirit realm. As the trio resolves a series of supernatural incidents hidden within everyday life, an unexpected event shatters the city’s tranquility. Under the ominous glow of a blood-red moon, they must confront a sinister conspiracy and fight to restore reality. Peace eventually returns to Huanhai City, and the 444 Convenience Store remains open for business, but along the ancient stone-paved streets, new mysteries are already beginning to emerge.