When Niko reaches out to Mel for help, she unknowingly reveals a new demon. Maggie volunteers to infiltrate the "cult" to help thwart him, but when she goes missing Macy and Mel set out to find her before it's too late. Harry must face the consequences of the "gift" that The Elders have bestowed on him, leaving Mel, Macy and Maggie shocked and angry. Mel thinks that Fiona might be the key to helping Harry, which seems to cause trouble between her and Jada. Meanwhile, Parker is getting worse and Maggie has an idea on how to make him better.
Three months after their mother is killed by an unknown demonic force, sisters Mel and Maggie discover that they have an older half-sister, Macy. The first time the sisters are under the same roof, they unexpectedly start exhibiting new magical abilities; the eldest Macy receives the power of telekinesis, middle sister Mel can freeze time, and the youngest Maggie can hear people's thoughts.
Soon after, Harry Greenwood gathers all three sisters together and reveals to them that they are witches, as was their mother. Marisol had bound her daughters' powers when they were born so they could live normal lives, and was in the process of unbinding those powers on the night she was murdered.
The sisters ultimately accept their new destiny as The Charmed Ones, the most powerful trio of witches who protect innocents and vanquish supernatural demons.