Luna survives a horrifying fall after her wealthy mother-in-law pushes her off a terrace to eliminate an unwanted slum romance, fleeing underground to raise her secret son Neo. Five years later, the little boy is diagnosed with aggressive leukemia, leaving Luna with only one desperate medical option.
Returning to the hospital, she discovers her former lover Ken is now the chief surgeon, engaged to an ambitious socialite. Hiding their past intimacy to secure a marrow donor agreement, Luna endures relentless sabotage from Ken's toxic family, fighting for her child's survival until the buried truth violently resurfaces.
