After the tragic death of Mel and Maggie's mother, the sisters struggle with moving forward but face another huge shock when they learn they have an older sister, Macy. With the emotions of all three sisters running high, each of the girls suddenly exhibit impossible new abilities: Mel can freeze time, Maggie starts hearing others' thoughts and Macy has telekinetic powers. While trying to understand their new powers, Harry Greenwood, gathers the sisters and reveals they're actually powerful witches, as was their mother. He also lets them in on a little secret, he's not really a professor, he's their "Whitelighter", a witch's advisor and guide. The sisters must make the decision to accept their new destiny as The Charmed Ones... and their new duty to protect humankind from the demons that walk among us... one of whom killed their mother.
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.