Y.G. Lee

Former bomb disposal expert and his fiancée board a high-speed train. Also, a well-known physics teacher who was involved in an affair scandal, also boards the same train in order to win back his wife. At the same time, there's a bomb on the train!

When Red’s boyfriend breaks up with her on her 30th birthday and throws himself at her new boss, she quits her job and signs up for a new Instagram account to start ranting about her shameless ex. Her life takes a dramatic turn when her posts go viral.