(கச்யப) Kachyapa was a saint. He and his wife, Maya, had three children named Suurabathman, lion faced Chimmalakthrathan and Tharakasuran. Three of them were asuras, who wanted to rule the universe. They prayed to Lord Shiva and got a boon that they can be killed only by a son born to him. They were of the opinion that Lord Shiva will never harm them as they are His devotees -- what many of us always think, taking things for granted.
With the boon on their side, they set out to conquer the three worlds with their mighty armies. One after the other all the Devas fell and were taken as captives. Suurabathman subjected them to do task which he liked rather than their regular one. Surya, the sun God, was asked not to scorch their country during His daily travel, instead to be very gentle while crossing their kingdom. Vaayu, the wind God was asked to blow gently along their streets. All got a task in the asuras kingdom.
After some time, they decided to seek Brahma's help and so went to him to narrate their sorry plight. Bramha was moved by their sorry state and took them to Vishnu for help. Vishnu said that He can't do anything as the asuras have a boon by which only Shiva's son can destroy them. He advised them to pray to Lord Shiva for an end to their perils.
On hearing the prayers of the Devas, Lord Shiva appeared before them. After listening to their miseries, he said that soon a son called Kandhan will be born to destory the asuras. Saying so he vanished.
Lord Vishnu reminded Devas that this was not possible as Goddess Parvathi was then born as daughter of Parvath maharaj and Lord Shiva transforming himself as Dhakhsinaamirthy, the Guru Bhavan -- Lord of Knowledge, was teaching to the sons of Brahma. On hearing this the Devas turned sad again and asked Vishnu if there was a way out. For which the Preserver smiled and said there is a way....
End of Chapter One