Piper & Leo,with help from Coop's ring,must travel back in time to change the events that lead to the deaths of Piper's sisters and the manor's destruction.Billie realizes the truth in what her sister has become.
Forced to hide from Billie and Christy,the sisters find themselves stuck in the Underworld.Leo appears to Piper and offers demonic approval;Billie & Christy resort to summoning the Hollow to stop the Charmed Ones and the Charmed Ones do the same.
Coop comes to the conclusion that he has fallen for Phoebe but she'd rather spend her life with a mortal. Meanwhile, Piper is on the hunt for killer demons; Paige finds it hard balancing life as a Charmed One with that of a married woman.
After Paige and Henry leave for their honeymoon, Cupid “Coop” takes Phoebe on a journey through her past romances in an attempt to revive her excitement for love.Billie and Christy’s parents come to town for a visit..
Piper organizes an engagement party for Paige and Henry,but the couple begin to get cold feet.Phoebe discovers a strange man following her but soon learns he is actually Cupid; a demon kidnaps Christy in order to get to the Charmed Ones.
Paige learns the difficulties of dating a mortal when Henry becomes too involved in the magical world and is torn when another suitor arrives hoping to convince her to marry him so they can become the ultimate magical couple.