Journeyman plot
Dan Vasser is a journalist from San Francisco, where he lives with his wife Katie and son Zack. One day he suddenly jumps back in time. He soon discovers that with every jump back, he can change the life of a particular individual. However, time travel also has a detrimental effect on his work and family life and makes Dan's brother Jack, a police detective, suspicious. Then he meets his former fiancée Livia in the past. He always thought she was killed in a plane crash, but she's actually a time traveler too.