Silus the platypus frog lives in the green air of a small remnant rainforest in southeastern Queensland, Australia. When heavy rain swells the creek where Silus lives, he is washed out to face the dangers of the world outside the forest.
While he is traveling to the Western Heaven in quest of the ancient Buddhist scriptures, the monk Hsuan Tsang is captured by the White Bone Demon and his disciple Monkey tries to rescue him.