Agatha Christie's Miss Marple: 4:50 from Paddington

Sojin (Park Joo-Hee) lives with her shamen mother in a wooded area outside of a small town. She hates her life in the town and what her mother does. After Sojin's mother dies, there's nothing left for Sojin in the town and she decides to catch the train to Seoul. Due to circumstances out of her control, Sojin misses her train and she flees from a man wanting her to locate his missing son. Meanwhile, she runs into another man (Kwon Yool) making chocolate out of his garage.