Hayley Hayes, a clumsy yet spirited university freshman, is eager to start a new chapter in her life far from her small-town roots. But her journey takes an unsettling turn when she starts experiencing vivid nightmares of a faceless woman in a bloodied white dress—an eerie echo of her childhood terrors. Struggling to fit in and navigate academic challenges, Hayley finds herself on the radar of her class's queen bee, Veronica, who spares no opportunity to make her life difficult. Amid the chaos of her first weeks, Hayley stumbles upon Chase, the mysterious and aloof physical education teacher with an aura that keeps everyone at bay. Despite his apparent disdain for humans, Chase is irresistibly intriguing—his sharp Asian features, piercing gaze, and unshakable composure make him impossible to ignore. But Chase is more than just a teacher. A demon soldier from another realm, he has one mission: to hunt and destroy a demon hiding on campus, one that has been wreaking havoc on the human world. When Hayley unexpectedly catches Chase vanishing into a wall during a chance encounter, she finds herself drawn into a web of secrets far beyond her understanding. As her nightmares worsen and bizarre events unfold around her, Hayley begins to piece together that her experiences are connected to the supernatural forces lurking in the shadows of her university. Torn between her own fears and an insatiable curiosity, Hayley’s persistence in uncovering the truth puts her on a collision course with Chase. While he tries to keep her at arm’s length, her stubborn determination and unwitting charm begin to chip away at his icy exterior. But as the demon threat looms larger and danger draws closer, Hayley and Chase must confront their differences and work together to unearth the truth—because the cost of failure may be more than either of them can bear. In Under His Watch, romance, mystery, and the supernatural intertwine as a forbidden connection blooms between a human girl and a mythical warrior, testing the boundaries of trust, loyalty, and love.