It is a story of a conqueror called Chau Ngi who is on a conquest to conquer different kingdoms. He is accompanied by his vast army and ministers in his march to conquer the different kingdoms with no rest.
It contains a mantra to protect the house or the country from the evil spirits or khings. Khings are the spirits of people who died at an early age or in an unnatural way. They are believed to cause trouble to the household or the country. So, this mantra is used to keep them away.