Tang Tang, a ten-year-old girl living with her uncle Trin, loves watching her favorite black-and-white action series, Charming Spy. One day, using special 3DDD glasses, she accidentally brings her idol, Secret Agent Chen, into the real world. When the glasses break, they struggle to find a way to send him back. Meanwhile, Chen gets involved in Trin’s life, his ex-girlfriend Jenjira, and their neighbor Plaifah—who is actually undercover agent Pawan.