Dung Duang Harutai is the story of three kingdoms. Kasit ruled by King Rungsimun is the wealthiest and most powerful but they lack a sea route, for this reason, King Rungsimun had planned to politically wed Princess Munisala of Thanta in order to conveniently use their water route. However, if both Kasit and Thanta were to unite that would cause Puntoolat to become isolated and for this reason, the three kingdoms have longed lived with suspicion of one another.