In the original Charmed series, Season 2, Episode 10, "Heartbreak City," focuses on the sisters assisting Cupid to retrieve his ring from the demon Drazi. The episode features key character moments, including Phoebe's connection with Cupid and Piper's relationship issues. You can find more information about this episode on the Charmed Wiki. "Charmed" Heartbreak City (TV Episode 2000) - IMDb