At 37, Ji-won, who is battling cancer, stumbles upon a devastating betrayal involving her husband and her closest friend, shattering her perception of her life. Tragically, her husband is responsible for her untimely death. Could her fate have been altered by different decisions? Luckily, Ji-won is granted the opportunity to alter her destiny by being reborn as her younger self. Determined to pursue happiness this time around, she first seeks vengeance. Her strategy? To ensure her deceitful husband ends up married to her ex-best friend.