"Dear Caroline: The first part of this journey is coming to an end. We are about to rendezvous with the Discovery. The race will be on now. We're going to send a boarding party over to climb inside this 800-foot long shipwreck, which is floating over Io, to see if she can be rescued before her orbit gives out. There are 9 years of secrets inside, including a sleeping computer who knows the answers. My past is also inside, and I want those answers."