Scientists say that all cells in the human body are replaced every seven years. The so-called "seven-year itch" is not people's conjecture, but God's destiny. Many things begin to undergo subtle changes when they reach the threshold of seven years, such as marriage, love, and various desires buried deep under the steel and iron bones of the city.
She is kind and beautiful, with a simple personality. An accidental car accident helped her find her dream job, but she unknowingly got involved in a series of love-hate encounters between three outstanding men born in the 60s, 70s and 80s with very different status.