Mission 18

Four kids sent to space find out more then they could ever imagine. Earth was dieing, no man above the age of twenty could survive the conditions of space, so they have to send four chosen kids into space on a mission to planet 18. They discovered this planet only three years before the pandemic, the planet was only a little ways away from Saturn, they have to hope that the materials on that planet is enough to save all of humanity. They don't plan on the planets atmospheres environment towards the kids, after they get on the planet they loose their general, trying to save her, they accidentally cause the whole ship to fill with the dangerous gas. Stuck, alone, and different, they have to figure out how to get back to earth faster than the speed they got there. While trying to protect the precious cure.