"A Mother on the Edge" movie follows Blair (Kelly Thiebaud) as she wakes up to a nightmarish reality. Her happy life takes a sudden turn when she finds out that her daughter is missing. Blair is convinced that she has been kidnapped and her life is in danger. But her husband Simon (Matt Hamilton) and others tell her otherwise. They try to tell her that her daughter Lori (Lina Renna) has been dead for a year now and what she is experiencing is not true. Blair doesn't believe a word of this and sets out on a mission to find the truth. She threatens her husband to tell her the truth and takes and employs violence against anyone she thinks could be involved in this cover-up, endangering the lives of people who love her. Are Blair's doubts about her daughter being alive true or is she suffering from some misconception that now threatens to destroy what's left of her family.