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In 2028, an era of highly interconnected technology (holographic projection advertising, high-speed Internet live broadcast) is in sharp contrast to the dirty, chaotic, and information-blocked London docks in 1699. Not long ago in 2028, Dodeus on the screen was exaggeratingly introducing the abandoned mine on the outskirts of Tetawa City to the camera, claiming that his "greatest adventure in life" could be photographed here. Aella rolled her eyes at her cell phone. She was about to complain about her boyfriend's exaggeration when a thunderbolt struck without warning. The room was dark for a moment, except for the full-length mirror in front of her that was strangely glowing. In the mirror, behind her reflection, a huge ancient and ornately carved wooden door that had never existed suddenly appeared.

Dongqing is a fool adopted by Dongjiu and Grandma. A car accident caused Dongqing to lose her memory. An accident took Dongjiu's life. Grandma couldn't stand the stimulation and died of a heart attack. When Dongqing had nowhere to go, she met Yang Daojie and worked as a nanny in her home. She lived a quiet life. Until Yang Daojie's friend Liang Yifei saw that Dongqing looked exactly like his friend, he suspected that they were long-lost sisters and secretly took their hair for DNA...