Secret Mission is set in Opalia, a small kingdom in south-east Asia in the 1950s. Because of its location, the USSR and the USA are both highly interested in the country.

Their agents have destabilized Opalia, and local rebels led by Prime Minister Vishaka plan to assassinate the king. You play Jeff, a double agent who is ambushed on arrival.

After waking up in your hotel with no memory of who you are or why you are there, you soon learn your identity and mission. Your task is to find evidence of the Minister’s devious scheme, while both superpowers pursue their own motives.