Helpless (화차 Hwacha) is a 2012 South Korean film based on the novel "Kasha" (All She Was Worth) by Japanese writer Miyabe Miyuki, who is known as the queen of crime fiction in Japan. The story follows a man whose fiancée vanished without a trace just before their wedding ceremony, and he needs help from his cousin to discover her dark secret. It was previously known as "Help" (헬프, Hel-peu) and "Train".