The sundara kanda forms the heart of Valmiki's Ramayana and consists of a detailed, vivid account of Hanuman's adventures. After learning about Sita, Hanuman assumes a gargantuan form and makes a colossal leap across the sea to Lanka. On the way he faces many challenges like facing a gandharva kanya who comes in the form of demon to test his abilities and he faces a mountain naming Mainakudu who offers Lord Hanuman some help to take some rest but he refuses because of the time is running out and there is a very less time remaining for searching Sita. After entering into Lanka he finds a demon lankini who protects the entire Lanka and Hanuman fights with her and kills her in order to get into Lanka. Here, Hanuman explores the demons' kingdom and spies on Ravana. He locates Sita in ashoka grove, who is wooed and threatened by Ravana and his rakshasis to marry Ravana. He reassures her, giving Rama's signet ring as a sign of good faith. He offers to carry Sita back to Rama, however she refuses and says that it is not the dharma. She says that Rama himself must come and avenge the insult of her abduction.
Hanuman then wreaks havoc in Lanka by destroying trees and buildings and killing Ravana's warriors. He allows himself to be captured and produced before Ravana. He gives a bold lecture to Ravana to release Sita. He is condemned and his tail is set on fire, but he escapes his bonds and leaping from roof to roof, sets fire to Ravana's citadel and makes the giant leap back from the island. The joyous search party returns to Kishkindha with the news.
