Backtime

Eric and Deborah, born in the 1950s, managed to meet, became friends, turned into soulmates and sometimes found themselves in unusual situations.
Linked by ancient ancestry, Deborah's oddball psychic skills lead to being observed and protected by benevolent aliens until her power matures, then contact is made, asking for help.
800 years later they return to a toxic, over-populated Paris, discovering a man living in physical isolation. History is forgotten, records corrupted. They have to educate him on how Earth was, they choose to dictate their life story to him in the hope adventure will stir his soul and others. This is their bold tale of life, and some of his. What would you write?