Having been exposed to the heartaches of a broken home, Lulu vowed that her marriage would last a lifetime. She carries out all duties of a wife, but a diagnosis of infertility soon arms her with insecurities. Despite Arnel's devotion, Lulu accuses him of having affairs including one with her best friend Emma. This ugly episode inevitably leads to separation. When Lulu returns after a few years, she faces the consequences of her mistakes and painfully recalls a vow that has become broken.