In a modest 1994 Derry orphanage, the fates of baby [Patrick Keeley](no specific actor credited) and an unexpected visitor intertwine, foreshadowing a grand adventure ahead. Fast-forward to 25 years later in the bustling streets of New York City, where Pat’s ambitious trek begins as he seeks to escape his past. Without legal documentation, he starts working at a lively Irish restaurant run by the caring Joe O'Brian, who becomes a father figure to him. Just as Pat begins to find his footing, he finds himself entangled in a web of trouble when Joe requests him to transport two dubious suitcases in exchange for a significant payout. An air of dread envelops him as he realizes the potential danger lurking within this request, especially as he crosses paths with a host of police officers while attempting the drop-off.
Desperate to alleviate his rising anxiety, Pat hops on the next bus and ends up in Santa Fe. There, he finds temporary refuge with Mrs. Ortega, a widowed B&B owner. In a moment of reassurance, Pat attempts to call Joe, only to receive a hostile response that sends him into further flight. But peace is short-lived; soon enough, the relentless henchmen, Jim and Seb, are hot on his trail, determined to eliminate him.
Amid the chaos, an FBI wiretap eavesdrops on Joe's phone lines, and agents begin to pursue Jim and Seb as part of an investigation into money laundering linked to Joe. Meanwhile, when Pat opens the suitcases and discovers a staggering $1.3 million, his life takes another dramatic turn, compelling him to reassess where he stands. He seizes the opportunity to indulge in a shopping spree, but this newfound wealth comes with its own set of warnings from Joe that further heighten his anxiety.
In a twist of fate, Pat is persuaded to don a Santa suit for the mall's holiday festivities, much to the chagrin of Emily (no specific actress credited). While adapting to this unfamiliar role, Pat discovers joy in entertaining children, allowing his heart to shine through despite the turmoil looming over him. As he skillfully maneuvers through the mall, utilizing a simple backpack instead of conventional luggage, he manages to stay under the radar, all while being watched by Jim and Seb, who are also in pursuit.
Emily's attempts to secure Pat's official employment are met with resistance as he clings to the freedom afforded by his illegal status. She proposes a dinner date, and reluctantly, Pat agrees, though his mind is clouded by his precarious predicament. During this tumultuous time, Pat also shares poignant moments with Mrs. Ortega, who reflects on her own losses, amplifying Pat’s contemplation on life’s fragility. Thus, seeking solace, Pat visits a nearby church and finds wisdom in the epiphanies shared by Padre Estaban, who also expresses hope for the upcoming church toy drive.
As Pat embarks on a date with Emily, their conversation reveals their individual struggles and shared longing for connection. The evening takes a lighthearted turn, aided unexpectedly by the enigmatic [Alowishus](no specific actor credited), who entertains Jim and Seb with a spontaneous performance of "The Twelve Days of Christmas." Yet, moments of joy are soon overshadowed when Pat learns that the FBI is hunting for him after tracing a phone call back to Mrs. Ortega’s.
With the stakes getting higher, Pat wears his Santa suit for the last time and forms an emotional bond with Vicente, a group home resident. Touched by Vicente’s situation, Pat teams up with Emily and the security guard, Ryan, in a journey to gather toys for children, aiming for a distribution on Christmas Eve. However, the plan takes a dangerous turn as Jim and Seb finally catch up to him, igniting an electrifying chase.
Navigating the mounting tension, Pat must use every ounce of cleverness to stay one step ahead of danger, ultimately finding a moment of redemption at the church where he deposits the backpack full of cash, leaving behind a heartfelt note for the children.
As the townsfolk gather in anticipation, Pat’s voice resonates through their hearts with a soulful rendition of "O Holy Night," heightening the drama of his impending capture. In a desperate bid for freedom, he commandeers a vintage fire truck, with Emily by his side, while attempting to reveal the truth of his predicament. But just as victory seems within reach, the fire truck falters, leaving Pat in a state of despair before collapse.
Upon awakening, Pat finds himself in the enchanting presence of a majestic reindeer and the legendary Santa Claus. Through flashbacks, it is revealed that Pat had been subtly guided by the diminutive figure, Alowishus, who recognized his kind spirit and generous heart. Santa, wishing to retire after nearly two millennia, sees potential in Pat to become his successor. With a heavy yet hopeful heart, Pat prepares to join Santa on this incredible journey, with promises of reunion with Emily lingering in his mind.
In the closing moments, Mrs. Ortega lovingly welcomes Vicente into her home. Meanwhile, Emily’s horizons broaden as she receives plane tickets to Ireland, paving the way for her own adventure, while a mysterious wrapped box filled with coal is left for Joe, hinting at the uncertain fate that awaits him.
