寇克将军，欢迎您重返企业号！　　一团硕大无朋的高能离子云，在遥远而神秘的太空中迅疾地飘移。这团能量云具有无坚不摧的威力，足以毁灭宇宙间任何物质结构。在它所划过的轨迹上，早已有好几艘分属银河三大势力的星舰遇难了…...

After a collision with a comet, a nearly 8km wide piece of the asteroid Orpheus is heading towards Earth. If it will hit it will cause a incredible catastrophe which will probably extinguish mankind.