In the present world, Sand, a young cosplayer fascinated by the coolness of "Thotsakan" (The Demon King), sees a Tokusatsu-style heroism in the art of Khon. He dreams of revolutionising the Khon club to be more contemporary, leading him to clash with Lucky, the beautiful-faced club president. Lucky is the grandson of a National Artist in Khon and fiercely adheres to tradition. An inexplicable attraction pulling them together may trace back to a bond from a past life that has never faded.

During the reign of King Rama VI, a good-humoured commoner Saen followed his master to the Phra Luang School to train in Khon with dreams of playing the role of Thotsakan. He secretly loves Khun Rak, the young nobleman playing Rama, who is high-born and beautiful as a deity.

Once bound by a forbidden love between master and servant, in this life, it's hatred at first sight. When fate bring the two eras to converge, where will fortune lead them?