On graduation day, Jiang Yue and four roommates jointly bought a lottery ticket that won six million. Huang Shaoteng, who was in charge of buying the ticket, falsely claimed it only won five, wanting to swallow the prize alone, and even used the ticket as collateral to borrow money. Relying on group chats, transfer records, and ticket purchase surveillance, Jiang Yue made him unable to change his words again. The prize money was finally split equally as agreed, Huang Shaoteng bore the debt alone, and Jiang Yue also relied on his own ability to open a warehousing and distribution office.