Dan arrives at the planet, only to find that the inhabitants are hostile and have sent an invasion fleet to conquer Earth.It is up to Dan and his crew to stop them.
While under the command of Col Lasker on Pluto, Dan is sentenced to death on charges of murder. His crew arrive to find him presumed dead and investigate his death.
As the title suggests. Once through the sun, Dan and his team-mates discover a planet inside the sun. I don't know how they survive without their suits in that heat, but it makes a good story.