When an evil presence from Phoebe's past life starts to threaten her with a violent death in the present, she decides to cast a spell to go back to the 1920's and stop him. While there, Phoebe discovers that the Charmed Ones past lives went down the dark path, and as a result, puts her present life on the line in order to change the past and vanquish Anton. Meanwhile, Piper discovers that her present life is similar to her past one, in terms of who to choose in her love life. Prue discovers a new passion.