Mel, Maggie and Kaela, along with Harry and Jordan, have now discovered that the cabal of foes coalescing to bring down the Power of Three are actually working for an ancient evil that's been laying dormant since the dawn of magic. This powerful dark force – known as the Lost One – will be the ultimate test of the strength of the newly discovered sisterhood; forcing them to rekindle their connection...or face the destruction of magic itself.

An alarming event triggers a drastic change in the magical universe. Only The Charmed Ones, along with Harry and Jordan, can save the world where humankind and magical beings co-exist...but they'll risk their lives in the process.

While the Charmed Ones are still reeling from a shocking turn of events, The Unseen have infiltrated every corner of the magical realm and are on the precipice of their plans to destroy the Power of Three forever.

As Mel, Maggie and Kaela are navigating their love lives, The Unseen bring an epic battle to The Charmed Ones'. Roxie seeks Harry's assistance, but his mission uncovers something - and someone - unexpected.

Maggie is surprised by someone important from her past and tries to keep the peace when they collide with her present. Mel, Kaela and Dev are on the trail of the Unseen, while Jordan and Harry seek assistance from a different powerful trio.

When it becomes apparent that conspiracy group The Unseen has assembled a hit list of anyone who has helped The Charmed Ones...the girls and Harry must scramble to warn - and save - their nearest and dearest now that everyone they know is an instant target.

Mel, Maggie and Kaela must divide and conquer when they become aware of a new, formidable threat inspired by the Tallyman. Maggie and Harry team up to chase down a lead in a dangerous magical realm. Mel needs Jordan's help healing a "creature" with whom she has a deep emotional connection. And Kaela's budding flirtation with Dev must contend with a surprise visitor from her past.

When a mysterious package arrives on the doorstep of Vera Manor, Mel and Kaela must turn to Dev to try and stop the Tallyman's (guest star ) deadliest attack yet. Meanwhile, Maggie is forced to do court-ordered "anger management" with a very unorthodox therapist.