The story starts with Forest officer Jacob being relieved from his duties in Naga forest. He hands over the charge to Sasi the new forest officer and briefs him about the odd things that were happening in the forest which includes stories about a mystic tree called ‘Kalpavriksha’, which at times walk around the forest and is capable of vanishing ,a group of men known in the forest as ’Sky Men’ and a tribal man who always walk around the forest with a corpse on his shoulders. Sasi and his wife Sheela settle down in the forest. They employ Vasu