Karen, who married a man with a child from a previous marriage, was desperate to become a real mother. In her sudden attempt to build a good relationship with her step-son, she sometimes gets into trouble with the parents of other classmates... But Karen lives her life believing that a happy family is ahead of her... But one day, she is told that her step-son has had an accident on a trip that the parents invited her to with their friends. Despite the humiliation, she accepts the situation, thinking, "If it's for my son and my family..." but...