A unforgettable fate

When two lovers die because of a tragic fate ,what happens when they are given a second chance to live again but this time they don't know each other .How do they use this life , why did they get a second chance to live again ,these are the questions they ask themselves.
But when these two lovers take a glimpse of each other ,they weirdly start to regain memory of who they were
What does their fate hold for them this time