Sarah has just escaped from the spaceship THK58 in an escape pod. She is rescued by another spaceship and immediately decides to go back to the THK58 to check if there were any other survivors. Jack Zervus, a medical officer, will assist her in this dangerous mission!
Return to the THK58 features a nice 3D intro and is hopefully longer than the original game.
Update: Return to the THK58 walkthrough in comments #25 and #27 (thanks abolresh!)