Leech

The only thing scarier in outer space is the fear of the unknown.

Captain John Lancaster's ship is critically damaged in an asteroid storm, leaving John and his crew stranded. Drifting off course. 

He was returning to earth with supplies and samples from planet Sol. When he and his team discover they are not alone on the ship. 

Something is hiding onboard and is taking the crew members out, one by one.  

Will John make it home to see his wife and child? Can he save his remaining crew?