As 11-year-old Leo faces the reality of his cancer diagnosis, he seeks solace in his younger sister Lily. He shares a remarkable secret with her: his illness has bestowed upon him a unique gift. By detaching his spirit from his physical form, Leo can levitate and glide through the air, experiencing an existence that is both invisible and intangible. He coins this ethereal state as a "Phantom," cautioning that spending too much time away from his body risks him fading into oblivion.
In parallel, NYPD Lieutenant Alex Tanner finds himself demoted to performing menial tasks due to a disastrous incident during a routine burglary arrest. His superior, Captain Simon, assigns him to these lowly duties, much to Tanner's dissatisfaction. As Leo's health worsens, he is urgently taken to the hospital for further evaluation. In an emotional scene, Leo mourns the loss of his hair and invisibly follows his mother home, where her heart-wrenching sobs for her son are shielded from Lily.
That very night, an alarming phone call from a disfigured individual threatens the Mayor: a devastating cyber attack will ensue, crippling New York City’s infrastructure unless a ransom of one billion dollars is met. This ominous figure, dubbed "The Face" by the media, orchestrates chaos throughout the city. Tanner, in a bid to catch The Face at the docks, finds himself bested and left for dead beneath a heap of crates.
However, it is then that Tanner’s path crosses with Leo's phantom. Leo, possessing the ability to guide Tanner's spirit back to his corporeal form, has previously done this for countless others, including those who were on the verge of extinction. When Tanner awakens, he is taken aback by the awareness that, unlike past patients, he remembers his encounter with the phantoms. To pursue The Face, Tanner consults Miss Mary Delaney, a savvy reporter who has received an anonymous tip about the villain's location. Eager to assist, Leo persuades Tanner to let him accompany them, as Tanner is still recuperating from his injury.
As Mary narrowly escapes an ambush by The Face, aided by Leo's otherworldly presence and Tanner's timely phone call, she seeks assistance from an unexpected ally – The Mole, a former convict on parole. With Leo's phantom keeping watch, their potentially dangerous journey to uncover The Face's identity begins. Meanwhile, back at the hospital, a heartbreaking moment occurs when Lily comforts Leo, who remains unaware of his own extraordinary capabilities.
The storyline shifts dramatically when Mary becomes a victim of The Mole's mistakes and is captured by The Face, leaving Tanner as her solitary hope. Confronted by certain death at the hands of The Big Guy and The Little Guy, The Face’s merciless goons, Tanner channels an inner strength and turns the tide just as hospital security arrives to apprehend them. In a startling twist, Leo's phantom reappears as the hitmen are seized, drawn back by the energy of the scene unfolding.
With an instinctual guidance, the phantom directs Tanner and Mary toward a ship named Vizir, where Mary is being held captive by The Face. Just as midnight strikes, The Face's devious plot unravels when Mary successfully guesses the password to disable the virus - > "Eyelids" - moments before he triggers a bomb meant to obliterate everything. As Tanner and Leo’s fading phantom work to ensure Mary’s escape, their joy is short-lived when The Face returns, furious over his foiled plans.
In a shocking climax, The Face’s own dog turns on him, attacking its master with ferocity. Mary seizes the moment to escape from the sinking ship, leaving The Face to contend with his own demise. Meanwhile, Leo's body succumbs to a coma, his spirit ensnared between realms.
As the chaos calms, Tanner reveals Leo's extraordinary abilities to Mary, who grapples with the heavy reality of their situation. In a tender moment, Lily reads a cherished bedtime story to Leo's still form, unwittingly reigniting his spirit, allowing it to reunite with his family in a breathtakingly heartwarming moment.
Months roll by, and Tanner rises to a new chapter in his life, having made a commendable recovery, now accompanied by Mary. A surprising call from Captain Simon breaks the news that the Mayor wishes to honor him with a ceremony and promotion, much to the Captain's displeasure. Standing with Mary, Tanner gazes out at the Manhattan skyline, feeling the city’s vibrant pulse resonating with their newfound rhythm of optimism and redemption.
