Mao Sanduo, an ordinary takeaway rider, spent four years of his youth and sweat, working from dawn to dusk to deliver takeaways, and forcefully confessed to his doctorate girlfriend Lin Wei. He fully expected Lin Wei to get married after graduation and start a family of their own, but what was waiting for him was a cold "We are not suitable". The pain of betrayal crushed Mao Sanduo. He drank all day long and lived like a zombie. On a thunderstorm night, a thunderbolt struck the drunken man. When he woke up again, he found that he had returned to four years ago - the day when Lin Wei had just received the doctoral admission notice and was about to report to school. With memories of his previous life and full of unwillingness, Mao Sanduo's eyes turned cold: this time, he was no longer the humble and dedicated licking dog, but wanted to make Lin Wei pay the due price for her betrayal, and at the same time, he also wanted to live a decent life for himself.
