The background story is truly restored and adapted from folk stories in the Mae Hong Son area on the Thai Myanmar border. 
A father lost his son in a tragic accident
He wants to use his wizarding skills to perform a ritual to revive his son, who turned into an earth-bound spirit
And you, wizards, accepted his invitation to help with the ritual
But things might not go perfectly as planned…
Remember this chant, “hong fo ong men, wu ri zi zha”, it can save your life in times of danger