Vol. 4 (Part II)

Fee decides to spend more time with her family and questions whether she'll ever return to space. 500 million miles away, Hachimaki is at the threshold of a new era for mankind as the crew of the Von Braun finally reach Jupiter. Back on Earth, the engineer of the Jupiter Mission, Weiner Locksmith, becomes haunted by the deaths of all those who lost their lives in pursuit of his vision.

Labeled as Volume 4 Part II instead of Volume 5.