Chuck (Zachary Levi) was once a top student in the computer department of Stanford University. When he was a senior, his friend Bryce slandered and stole the test papers, and his girlfriend Jill was also taken away by him. Since then, he has been depressed and worked as an electrical repairman in the BuyMore supermarket in his hometown. By chance, Chuck's life has changed dramatically. An old friend who works for the CIA sent him an email, and then the world's most confidential spy intelligence was implanted in Chuck's brain. Chuck unknowingly became a secret weapon of the government, and the survival of the whole world depends on his thoughts. Supermarket chores and saving the world have become Chuck's daily work. What interesting things will happen?