The crew of the Icarus is used to high-stress situations: their ship is designed to dive into the heart of a star to collect scientific data for research. But when they discover an alien artifact hovering in low orbit of the Sun, the attempt to retrieve it pushes them to the breaking point. Captain Gordon Markov is more than happy to oversee his final mission on board Icarus. And Doctor Stephen Straub is more than happy to be a part of the prestigious research team assigned to the ship. Testing out the Icarus's new heatshielding is the plan, but the artifact in orbit of the Sun leads Doctor...