You and your sister are orphans and grow up together with your brother who is your neighbor. One day, returning home together, the brother picked up a pack of cigarettes out of curiosity. While all three were inside, a fire broke out, and your sister and the brother were rescued, while you were left behind. Many years later, you grew up to become a successful CEO, while your sister became a worn-out housewife to the neighbor's brother. Initially wanting revenge on your sister, you discover her enduring domestic abuse while pregnant, which deeply makes you hurt too. When your sister faces a life-threatening situation, you face a crucial decision: whether or not to save her.