Peter (Aaron Kwok) lost his parents at a young age and lived with his brother Greg (Huang Wenyong). Peter has been living under his brother's meticulous care and has never had to worry about his livelihood. Greg's true identity is a hacker agent specializing in the Internet. What Peter didn't expect was that his brother was killed because he participated in attacking the national defense security system and selling intelligence. Peter lost his brother's protection and firmly believed in his brother's innocence. He also knew that he was the only one who believed in his brother. He joined hands with his friends Benny (Daniel Wu) and Janet to come to Singapore and began to investigate the truth of the incident. As time went on and the investigation deepened, a conspiracy related to national defense security gradually surfaced. Peter cooperated with the police and was determined to find out the mastermind behind the scenes and avenge his brother.