"There exists a technology that allows doctors to weave artificial memories, so that the patients wake up with recollections of things that didn't actually happen. However, the conflict between real and artificial memories means that only those on their death beds can experience it, to fulfill their lifetime dream for one brief moment before dying. A man named Johnny wishes he'd been to moon, so doctors Rosalene and Watts must step back through his interactive memories in fragmented reverse chronology until finally reaching his childhood."