Nailed (2019)

 

Jae-Gu (Park Yong-Woo) and Sun-Yeong (Jo Eun-Ji) are a married couple. They run a car repair shop that's located by a small highway and they get very few customers. One day, they get a customer who has a flat tire. Since then, they get more customers with flat tires. Jae-Gu figures out that the flat tires are caused by metal pieces that fell off of a truck from a construction site and onto the highway. Jae-Gu wants to make more money and his wife eventually helps him. Soon, they face another problem.