Piper and Leo see a marriage counselor to work out their recent marital problems. Wanting to avoid a he-said, she-said rehashing of their past, Piper casts a spell to allow them to literally see the key moments in their relationship. However, the spell goes awry when Phoebe and Paige are sent back in time to relive Piper's memories. Unbeknownst to Phoebe and Paige, a warlock, accidentally caught up in Piper's spell as well, is using the opportunity to kill the Charmed Ones cat, their familiar, altering the future.