Luna Locke, a talented woman from a prestigious family, makes a bold decision due to her dissatisfaction with the marriage arranged by her family – to elope. In a hurry, she chooses a seemingly ordinary construction worker as her temporary partner, hoping to break free from the shackles of her family. This sudden "marriage" is just a matter of expediency for Luna Locke, and she never thought it would become an incredible turning point in her life. The male lead is outwardly an ordinary construction worker, commuting daily between the concrete and steel of the city, but in reality, he hides an unknown secret – he is the billionaire behind a large group in the country. He is tired of the deceit in the business world and chooses to live incognito and experience the life of an ordinary person. His modesty and sincerity give Luna Locke an unprecedented sense of warmth and security in their relationship. Over time, Luna Locke discovers that this man, whom she originally thought was just a passerby in her life, has such a deep inner world and amazing wealth. She begins to re-examine this relationship, from the initial escape and compromise to the later understanding and appreciation, and two hearts connect unintentionally. When the truth comes to light, Luna Locke realizes that she has not only found true love, but has also unexpectedly become the wife of a billionaire. This seemingly absurd marriage actually contains the clever arrangements of fate. She learns to cherish the person in front of her, no longer be restricted by the eyes and labels of the outside world, and bravely live out her own colors. And the male lead also finds long-lost happiness and peace in this unexpected marriage. Together, they prove that love knows no identity or status, and that true happiness comes from the harmony of hearts and mutual understanding. Luna Locke's story becomes a wonderful story that transcends classes, reminding the world: True love is priceless, and sometimes, the most beautiful accident happens in the most inadvertent moment.