Returning from Singapore, Diamond - the daughter of Thiet who is a business tycoon and owner of a large economic conglomerate - is watched by many forces. Thiet assigns his trusted bodyguard, Yang Yong, to protect his daughter, but Diamond repeatedly escaped Yang Yong's supervision to have fun with his friends resulting in her being kidnapped or finding herself in danger many times. Fortunately, she is always helped by Cao Bang. Diamond loves Cao Bang, despite knowing that he is the nephew of Mrs. Ha Bing, her stepmother, who always confronts and harms her. However, their relationship faces turbulence when her younger siblings Ruby and Quartz are also kidnapped, adding to the sudden appearance of Vinh An (Thanh Binh) in her father's company with many strange coincidences.—Anonymous