Revenge of Others is a high-octane South Korean thriller and mystery drama that follows Ok Chan-mi, a high school shooting athlete determined to uncover the truth behind the suspicious death of her twin brother. Believing his death was not a suicide as officially ruled, she transfers to her brother's school, Yongtan High, to investigate. At the school, she crosses paths with Ji Soo-heon, a student who takes on revenge assignments on behalf of bullied victims in exchange for money. As Chan-mi and Soo-heon's paths intertwine, they get pulled deeper into a dark web of school violence, secrets, and concealed motives. Together, they navigate a dangerous game of retaliation while racing against time to unmask the true culprit.