Five years ago, a sudden disaster inextricably linked Interpol agent Felix with the mysterious John, binding them by life and death, and sealing an oath of "never to forget." However, after Felix was rescued, John vanished without a trace. Five years later, he resurfaces as "Zhuo," the cold and memory-less patriarch of the Yafei family, with no recollection of her.
Carrying a complex mix of love and resentment, Felix infiltrates the Yafei family as a security consultant, determined to uncover the truth behind the accident five years ago and awaken John's dormant memories. Under John's "golden cage" control, she treads carefully, yet unexpectedly triggers fragments of memory deep within his mind.
As the threat from the mysterious organization "Shadow" surfaces, and internal family strife intensifies, John is critically wounded and falls into a coma while selflessly protecting Felix during a crisis. His memories fully return. Finally, putting aside all barriers, the two formidable individuals join forces to combat "Shadow's" conspiracy and expose the family traitors.
After enduring trials of life and death, John learns true trust and respect, while Felix finds belonging and freedom. Ultimately, John proposes to Felix again at a profoundly meaningful location, fulfilling the vow made five years prior. Their story is not just a return to love, but a journey of healing their respective traumas and redeeming their souls, marking a new chapter of mutual happiness.