Upin and Ipin are five-year-old Malay twins who and their elder sister Ros and grandmother Uda (whom they call Opah) in a kampung house in Kampung Durian Runtuh. They have lost their parents in their infancy. Upin and Ipin study in the village's Tadika Mesra (kindergarten), where they with a group of classmates, including the adorable and right-thinking Mei Mei, a joker and poetic Jarjit Singh, the clumsy and short-tempered Ehsan, an easygoing and sarcastic Fizi (Ehsan's cousin), and an entrepreneurial and meticulous Mail.