“Oasis” is set in the turbulent times of South Korea between the ’80s and ’90s. It depicts the fierce life, revenge, and conflict of young people who have to pursue power and wealth by any means in an era filled with wrong social values. Lee Doo Hak is a young man who was born in a small city in Jeolla Province and grew up innocent with a clever brain. However, he fatefully becomes caught in a whirlpool of events and ends up in the middle of conflict. After going through a real estate fraud group, he becomes a “political gangster” and lives his life to avenge his father’s unjust death.