Liam Linden transmigrates into the body of a scumbag, the disliked live-in son-in-law of Stella Shaw, eldest daughter of the wealthy Shaw family. He awakens The Ultimate Protector System and vows to protect Stella. He repays harm from the Shaw family. As Stella breaks away and falls for Liam, the mystery of her birth and connection to the Capital's wealthiest family, the Forrest family, is unraveled.