Bored with nothing to do for their school holidays, Badrol invites his best friend Lim to go on a camping trip at his old Kampung where he grew up, with intentions to experience some long-forgotten true Malaysian life in his Grandfather’s durian orchard. However their simple holiday trip is cut short by the discovery of a clue that leads them closer to the legend of the mystery house deep in the forest. Together with their newly found friends, Rajoo the animal-whispering boy, Rose the village beauty, and her two mischievous twin brothers, they work together to unravel the secrets surrounding the small Kampung.
The music for Geng is mainly composed by Yuri Wong, who also composed music for the related animated series Upin & Ipin, along with Mohamed Azfaren Aznam, who contributed music as a second composer.
Ada sesuatu yang mengganggu ketenteraman Kampung Durian Runtuh. Penduduk kampung menyebarkan cerita tentang kewujudan suatu makhluk yang menggerunkan menjelang waktu malam, namun tiada siapa yang berani mencari kebenaran disebaliknya...
Sehinggalah Badrol dan Lim, serta rakan-rakan baru mereka terjerumus ke dalam misteri tersebut tanpa disengajakan. Seekor haiwan aneh yang tidak diketahui asalnya, menjalin persahabatan dengan Rajoo dan membawa mereka semua ke suatu pengembaraan, jauh ke dalam hutan hujan Malaysia yang penuh dengan hidupan liar, termasuk seekor ular gergasi yang mistik. Sertai mereka, dalam mengungkap misteri dan merentasi cabaran di sekitar keindahan panorama flora dan fauna Malaysia.