There was something happening to earth that made the people die so they had to evacuate it if I'm not mistaken. I remember a family where the dad is always in space and he communicate with his kids through Skype. The father gave his daughter his watch so she could remember him. In the end the father came back but he was younger than his daughter and his daughter was an old lady. There is a part where when the father was in space that he fell into something then he found away where he could see what's happening on earth and he saw his daughter room when she was little and he tried to xommunicate with her through the watch