Ten-year-old Kwong is a Primary 5 student who has to contend with "Internal assessment for Secondary Places" and parents who constantly argue. He is at a loss. His grandma, who lives alone, is always patient and happy to learn about his world. Grandma passes away suddenly, Kwong suffers from insomnia. At night, when he looks at the boundless sky, he feels secure, as if many friends are talking to him. He keeps all this to himself. To his parents, Kwong is just a naughty boy. They have no inkling that Kwong may be experiencing emotional problems.