What if you could use time travel to save your life? Welcome to Lifeline, a series about the Lifeline insurance agency, whose specially trained agents jump forward in time to prevent the deaths of their clients. But when a jump goes horribly wrong and lives are lost, one of Lifeline's top agents makes a secret promise to protect a young girl who is orphaned as a result of the mishap, and finds a way to undo the events of the past.