5-year old twin brothers Upin and Ipin, together with their friends Ehsan, Fizi, Mail, Jarjit, Mei Mei, and Susanti stumble upon a mystical kris that leads them straight into the fantastical kingdom of Inderaloka. While trying to find their way back home, they are suddenly burdened with the task of saving the kingdom from the clutches of the evil Raja Bersiong. With help from Mat Jenin and Belalang, Upin, Ipin, and their friends must overcome a series of challenging obstacles in order to restore the kingdom back to its former glory.