Determined to reintegrate, witch Sarah Fenn returns to Sanctuary but a horrific magical murder forces her to work with DI Maggie Knight in solving the case; Harper meets an intriguing stranger on her journey and makes a new discovery.
Sarah and Maggie determine that Angela has the most to gain from the murder and agree that they need more evidence; a magical attack on Harper forces Sarah to betray Maggie; following the attack, Sarah rekindles her romance with Lachlan.
Lachlan is arrested for Pierre's murder; Sarah and Maggie fight to clear his name by revealing Ryan's magical death to Deveraux; Angela intensifies her campaign against witches; Harper, revealing her magic, unbinds Lachlan.
Having unbound Lachlan, Harper fears she might have damaged his magic forever; fearful of the ramifications, Sarah hands over Starcross to the Moot; when Bea goes missing, the killer's identity is revealed; Sarah and Harper fight to save her life.
Sarah, Lachlan, and Harper plan to leave Sanctuary; Maggie discovers Lachlan's connection with the revolutionary Redhaven group; Angela's anti-witch bill passes but the truth about Luka is revealed; Sarah and Harper both embrace their destinies.
The dark mystery of four women, a wicked secret, and a murder investigation that shakes their idyllic English town to the core.
When a teen sports star dies, the community of Sanctuary is shattered; DCI Knight expects a straightforward investigation but the response of Harper, daughter of a local witch, leads her to suspect there's more to his death than meets the eye.
When non-witch daughter Harper is accused of murder, Sarah must use her magic to prove her innocence; fueled by local resentments, suspicions transfer to mother and daughter, while Abigail tries to blackmail Sarah with an extraordinary demand.
An expert confirms that magic was present at the crime scene; Harper makes a shocking revelation to Sarah who warns that her disclosure, if revealed to the police, will make her a suspect; an accusation from Harper sends Abigail into revenge mode.
Harper's accusations that Daniel raped her put the spotlight of suspicion on her and Sarah; a vigil in Daniel's memory whips up ill feelings within Sanctuary; abandoned by The Moot, Sarah fears all is lost; Harper attacked at school.
Reeling from the attempt on Harper's life, Sarah decides to cast a spell over all of Sanctuary; Maggie discovers more about Harper's life away from Sanctuary; the truth emerges about the rape allegations.
When new information verifies Harper's accusations, Abigail attempts to clear Daniel's name by fueling anti-witch feelings; Aided by the appearance of a mystery virus and evidence of Sarah's failed spell, her campaign has devastating consequences.