Althalia Cabrera might seem like any other witchy Portland hipster whiling away her days behind the counter of a freaky occult museum, but there's more to her whole deal than a trendy pursuit of the craft. Althalia is a bruja by blood—the youngest in a long line of powerful magic users from a long-ago culture indigenous to Mexico. In her twenty years, Althalia has studied with her loving abuela by her side, supporting and mentoring her use of the family magic, and protecting her from the darkest parts of their practice's history. But just as Althalia's inner light and power begins to shine, the darkness of the past finds its way into her world and strikes a tragic blow, testing Althalia in ways she might not be prepared enough to survive.

After a disturbing confrontation with an aggressive priest, Althalia Cabrera's abuela Isadora has collapsed, and Althalia is arrested while trying to protect her. Now the young bruja—for the first time without Isadora's guidance—must attempt to summon both her innate strength and her years of training in the craft to try to save her family's beloved matriarch. But it may already be too late to take down the dark forces that seek to strip both of the Cabrera brujas of their power.

Season of the Bruja is a story inspired by writer Aaron Durán's deep love for his Mexican family's cultural traditions, combined with his lifelong fandom of horror stories, comic books, and TV shows like Buffy the Vampire Slayer.

After the sudden loss of her beloved abuela Isadora, young bruja Althalia Cabrera is desperate—if she can act quickly enough, she may be able to pull Isadora back from a cruel eternity she doesn't deserve. Going against both everything she was taught and the warnings of her family, Althalia opens a forbidden door to the ancient past and enlists the help of the Aztec death deities Mictēcacihuātl and Mictlantecuhtli. The connection supercharges Althalia's powers but threatens the balance she must maintain if she has any chance of saving Isadora without losing everything else she believes in.

Althalia Cabrera is desperately trying to do the right thing, but exactly what the right thing is has never been murkier to the young bruja. She can either accept the help of her indigenous religion's ancient death gods and save the life of her beloved abuela, or face the loneliness of being the last of her kind. Shattered by grief and surging with her growing power, Althalia is about to show the underworld what can happen when you threaten the wrong witch's sweet little abuela.

Season of the Bruja follows a young woman as she comes into her magical abilities and faces reemergent threats from the past. From a young age, Althalia knew she would someday be the last of her kind—a bruja, tasked with keeping the power and stories of the ancient ways from fading fully into history. Never alone, Althalia works in a paranormal museum with her friends, a real-life Chupacabra and a were-coyote, while living with and caring for her beloved abuela. Through these powerful connections, her skills and knowledge grow. But the prejudice her people have always faced continues, and after a seemingly random encounter with a priest, Althalia feels the weight of hundreds of years of religious oppression coming down upon her and her abuela. She must realize her destiny and grow into it quickly if she is to prevent the church from achieving its ultimate goal—destroying the last bruja.