Set in Suwanthani during the early Rattanakosin era, this story follows three slaves—Sang Thong, Mai Phlong, and Thong Bai—who serve Khun Phra Bamroekrung. Each has unique traits, with Sang Thong being charming, Mai Phlong witty, and Thong Bai an inventor ahead of his time. They fall for Jolie, a foreign missionary. When the groom is found murdered at a wedding, the trio is accused and must escape to uncover the true killer while facing damning evidence against them.