In the age of legendary heroes, the fierce Simi hero Conan (Arnold Schwarzenegger Arnold Schwarzenegger) has to accept the request of the alien queen Taramis to accompany the queen's niece Jenna to get the magic key "evil heart" in order to revive his beloved Valeria. Jenna is the chosen one recorded in the ancient scrolls, only she can get the key and open the legendary treasure, and Taramis's plan is to use Conan to protect Jenna and kill them all after success. Taramis sent the bodyguard, Bomberta, to go with Conan and spy on them. Conan and his party rescued oriental wizards and black female warriors on the way, together with friends of thieves, and seven people arrived at the castle in the lake, where evil hearts were hidden. The wizards in the city cast spells to take Jenna away, and Conan and others finally rescued Jenna, and this is only the beginning of the adventure.