Radiant : Explorer Third Class Youn Sue is Expendable - a member of the highly skilled and highly disposable Explorer Corps trained to undertake hazardous missions so that the rest of humanity need not be upset by their (almost-certain) deaths. With her partner, Tut, Youn is sent to rescue an innocent planet from the extremely dangerous sentient Balrog. But how do you defeat an alien intelligence so advanced that it literally knows what you will do before you do . . . especially when it has its own sinister plans?