Lin Chen, the youngest captain in the history of the Long Yuan Special Forces, codenamed "Long Yuan", was betrayed by his comrades during the "Demon Hunting Operation" three years ago, and the entire team was almost wiped out. After he survived by chance, he returned to Jiangcheng City anonymously with the instructions written in blood by the old leader Su Zhenguo before his death to protect the old leader's only granddaughter - Su Muxue, the president of the Su Group. At this time, Su Muxue was caught in many crises: the company's vice president joined forces with external capital in an attempt to seize power, underground forces coveted the Su family's industry, and mysterious killers were attacking one after another. Lin Chen relied on his extraordinary skill and wisdom to resolve crises time after time, while gradually uncovering the truth about the betrayal. In the final battle, Lin Chen had a fateful showdown with the mastermind behind the scenes, the Demon Sword, and killed the traitor with his own hands, thwarting the enemy's plot to destroy Jiangcheng. He was awarded the title of "Hero of the Republic" by the country, but he refused the high-ranking official's generous salary and chose to stay in Jiangcheng to protect Su Muxue. Lin Chen established the "Longyuan Security Company" to protect ordinary people from dark forces and at the same time cultivate special talents for the country. He held a grand wedding with Su Muxue, and the two worked side by side to protect the peace and tranquility of the city.
