Seven sisters were born in rainbows nights. They have their own colours just because of this, and that's why they are called the rainbow princesses. The King and the queen were surprised by their daughter's but didn't say anything. When they were younger the rainbow god separate them and ended up on different places. They met their lovers and live together with them. Until one day their lovers who were somehow friends with eachother and they were also soldiers and the castle take them back to Korea. What will happened when the King and the Queen see their kids again? What will happened to the sisters when they will touch eachother?