Shen Mo is the manager of Twilight Apartments: gentle and patient, he has earned the tenants’ trust. But the residents have never truly left the building. They signed eternal residence contracts and are trapped in a cycle that repeats every seven days. Shen Mo’s job is to maintain the cycle and collect the “shards of time” generated by the tenants, which keep the apartments in existence. That is, until Lin Che, a new tenant who is 25 and a memory detective, moves in and begins to notice the time anomalies. An endless battle over memory, contracts, and escape begins… But the apartments’ secret runs far deeper than the cycle itself.