In the current era of rapid technological development, 25-year-old illustrator Lin Xiaoman and her long-distance boyfriend Shen Yan used brain-computer interface technology to achieve dream sharing in order to bridge a distance of 2,000 kilometers. Every night, they get together in the cabin in their dreams, telling their thoughts and love, as if the distance has never existed. However, in an accidental dream, Lin Xiaoman found a photo in Shen Yan's room that did not belong to them - in the photo, Shen Yan hugged a strange middle-aged woman, the background was an old community, and the date was displayed as twenty years ago.
Doubts and uneasiness lingered in Lin Xiaoman's mind, and she began to investigate secretly. Realistic clues gradually emerged: Shen Yan's colleagues avoided talking about his past. The ID card on the rental contract showed that he was 30 years old, but the community security guard accidentally mentioned that "Mr. Shen moved here ten years ago and he looks much younger than his actual age." When Lin Xiaoman got a copy of Shen Yan's ID card for verification, he was shocked to find that his actual age was 15 years older than the ID card.
As the investigation deepens, more mysteries emerge: Why does Shen Yan conceal his true age? Who is the woman in the photo? How does the mysterious technology research and development project he is engaged in relate to all this? In the intertwining of reality and dreams, Lin Xiaoman gradually approached the truth, but also fell into a greater crisis. What was once a sweet shared dream has now become a maze full of lies and secrets, and her love for Shen Yan is also crumbling under the impact of the truth. When the time difference between dreams and reality is broken, can this love that spans time and space find the true answer in lies?