The door to 1937 is hidden in the wardrobe of cheongsam designer Su Nian's old house. Every Wednesday at midnight, she becomes the young lady of the Su family in Shanghai and meets the ruthless warlord Lu Zhengnian. He gave her a pocket watch engraved with the word "read", and she brought back his burning worries. In modern time and space, architect Lu Zhengnian always puts a cup of warm tea on her desk, his eyes seem familiar. When the Su family was involved in the dispute in the old Shanghai, Su Nian took the encrypted ledger that he fought to protect and was separated in two time and space. In the Republic of China, he shielded her from the gun, but in modern times, he held her hand tightly in the hospital bed: "Don't be afraid, I'm here." They used the gears of their pocket watches to convey code words, confirming each other in the gaps of time. Finally, in the courtyard of the restored old house, he is wearing a replica suit, and she is wearing a cheongsam that blends time and space. The gears have been turning for hundreds of years, just to mend a deep love that spans time.
