Having lost her memory, Ham Myo Jin rebuilds her life under the care of her fiance, Ryu Jun Ho. But cracks form as an investigation into a villa explosion and her friend Choi Hee Su's death unfolds. Named a prime suspect, Myo Jin is protected by Jun Ho, yet the evidence keeps pointing her way. As fragments of her past resurface, she faces unsettling truths she can no longer avoid, including the possibility she was deeply involved in her friend's death. Caught between Jun Ho's unconditional love and the tightening investigation, she is pushed to a point where she can trust no one, not even herself. The truth draws closer, suspicion erodes every relationship. Myo Jin is left at the brink of a choice where doubt is the only certainty.