Five main heroes, teenagers, have to embark on a great adventure. They are transported far beyond their galaxy. Young men have got a difficult task to protect the universe from all kind of evil. Each of the teenagers has taken control of a lion robot. The leader of the group Shiro managed to get the Black lion. Impulsive and active Keith has got the Red lion. Calm Lance is riding the blue one and clever Pidge has become the pilot of the Green lion.