Mr. Blackthorn, The Lady Returned Home With Her Child, Stunning the World.

Athena Ashford used to be the top assassin 'Shadow' in an international dark organization. Wanting to retire, she got entangled with Damian Blackthorn during her last mission. Five years later, she returns to City A as the daughter of the Ashford family, bringing along her five-year-old influencer son Leo. Because Leo's voice has a miraculous effect on Damian Blackthorn's comatose mother and to escape her ex-fiancé's harassment, she becomes Damian Blackthorn's personal assistant. During this time, assassins from the 'Sky Wolf' faction go after her, and Damian Blackthorn gets injured saving her, so she moves into his villa. Damian Blackthorn is certain Leo is his son, but Athena avoids the topic. Damian expresses his love, while Julian Blackthorn causes trouble. Victoria Ashford, out of jealousy, stirs up conflicts and is later revealed to have a cheating mother, leading to her being kicked out of the Ashford family. The 'Sky Wolf' goes after Athena again, and both are captured, during which Athena is willing to risk her life to save Damian. In the end, Leo saves them, and misunderstandings are cleared up. With Leo playing matchmaker, their relationship heats up, Damian uncovers the truth from five years ago, Julian Blackthorn's kidnapping attempt fails, and the Sullivan family goes bankrupt. Damian Blackthorn marries Athena Ashford, she becomes pregnant after the wedding, and the whole family happily stays together.