Lin Fan was once the ace special forces "Dragon Teeth". After a failed mission resulted in the sacrifice of his comrades, he became frustrated and became an ordinary security guard in a high-end community in Donghai City, preparing to live a miserable life. When he is at his lowest, he binds the [Life Sign-in System] and signs in at different locations to receive various rewards. He originally wanted to keep a low profile, but troubles around him kept coming: colleagues who ridiculed him, property managers who made things difficult for him, ex-girlfriends who looked down on him... Lin Fan had to show off the power of the tip of the iceberg time and time again, starting from a small community, building his own business empire and underground forces step by step, and eventually becoming a globally recognized behind-the-scenes godfather.
