Olivia's husband, Chad Lester, carries a genetic defect that causes most of his children to have intellectual disabilities. He also indulges his healthy daughter Violet—born from his ex-wife—who ends up causing the death of Olivia's son, Liam. After that, Olivia uses LuckyBump, a virtual system, to get pregnant with high-IQ twins and stays in the Lester family. She fights with strategy while uncovering the secret behind Chad's genetic defect, and eventually makes the evil members of the Lester family pay the price.