Xu Shunhua, a junior psychology girl, interned with psychiatrist Lu Xianyu, until one day the peace was broken by a man named Cheng Jianian. The inexplicable sense of familiarity made Xu Shunhua deepen her bond with him step by step, and she was also surprised to find that Cheng Jianian was actually a patient with schizophrenia. When she doubted whether Cheng Jianian was the elder brother she had been looking for for many years, she accidentally discovered that Lu Xianyu was the person she had been looking for for many years. As her childhood memories were uncovered layer by layer, what was hidden behind this coincidence? Either ugly or beautiful, under the wash of the long river of time, I hope the past will only be as bright as the stream of light.