Decades have passed since the terrifying winter at the Overlook Hotel, but the boy who survived, Dan Torrance, carries its chilling legacy within him. Haunted by the malevolent spirits and the echoes of his father's rage, Dan drifts through life, a man shackled by the bottle, seeking to drown out the echoes of the shining that still whisper in the dark corners of his mind. He moves from town to town, his extraordinary abilities dulled by alcohol, a desperate attempt to create a shield against the psychic intrusions that plague him.
Eventually, Dan finds himself in a quiet New Hampshire town, a place where he hopes to finally outrun his demons. Here, he begins to attend Alcoholics Anonymous meetings, slowly, painfully, rebuilding his life. He takes a job at a hospice, the Helen Rivington House, and it is here, amidst the quiet solemnity of the dying, that his true gift re-emerges. With the aid of a cat named Azzie, who senses the coming of death, Dan uses his shining to provide comfort and peace to those on the precipice, earning him the tender moniker "Doctor Sleep." He helps them transition, easing their fears and guiding them gently into the unknown.
Meanwhile, across the country, a new light is dawning. Abra Stone, a young girl born in 2001, possesses a shining far more potent than Dan's, a brilliant, untamed force that manifests early in her life. She can predict events, and her psychic reach extends across vast distances. Unbeknownst to them both, a telepathic bond forms between Abra and Dan, a connection that deepens as Abra grows. She sees things, experiences visions that are both wondrous and horrifying, and her burgeoning power attracts the attention of a sinister nomadic cult known as the True Knot.
The True Knot are quasi-immortal beings, led by the formidable and utterly ruthless Rose the Hat. They are vampires of a different kind, preying on children who possess the shining, draining their "steam" - the psychic essence released during moments of extreme pain and fear - to sustain their unnatural lives. They travel in RVs, hunting their victims, whom they call "Rubes," across America. As members of the True Knot begin to fall ill from a disease contracted from one of their victims, Rose becomes fixated on Abra, believing the girl's exceptionally strong steam holds the key to their survival and an end to their nomadic existence.
Abra, through her connection with Dan, witnesses the horrific ritual torture and murder of a young boy by the True Knot. Horrified and enraged, she reaches out to Dan for help, and he can no longer deny the call of his past or the responsibility his gift demands. He reveals the truth of his connection to Abra's family and, together with Abra's father and his coworker Billy Freeman, who also possesses a touch of the shining, they devise a plan to protect her.
The initial skirmishes are brutal, a clash of powers that leaves several members of the True Knot dead, but Rose the Hat will not be deterred. She is relentless, her hunger for Abra's steam an insatiable fire. Dan knows that to truly protect Abra, they must face Rose and her remaining followers head-on. Guided by the spectral wisdom of his old mentor, Dick Hallorann, who speaks to him from beyond the grave, Dan recognizes that the final confrontation must take place on sacred, haunted ground.
The journey leads them back to the desolate, frozen landscape where the Overlook Hotel once stood, now just a memory, a scar on the earth. Here, Dan, Abra, and their allies prepare for the ultimate battle against Rose the Hat and the remnants of the True Knot. It is a confrontation steeped in both psychic power and the lingering, malevolent spirits of Dan's past, a place where he must finally confront not only Rose but also the specters that have haunted him for decades, bringing his long, arduous journey toward redemption to its chilling and explosive climax.