First Love Revenge summary: At 28, Seo Yeon-ho reunites with his first love, Joo Geon-woo, whom he had sworn to get revenge on since childhood. Intent on finding a weakness in the now-famous actor, Seo meets Geon-woo once again, driven by that singular goal. But instead of uncovering any vulnerabilities, he finds himself constantly toyed with by Geon-woo.