Caelus Samuel Thunderite, a thirteen-year-old boy with a mop of unruly dark hair and piercing blue eyes that reflect his relentless curiosity, stands at the precipice of a life-changing journey. Raised in the bustling orphanage of New Terra, Caelus never knew his parents, a fact that has fueled his imagination and dreams of a family he might one day find. His attire, a mix of hand-me-downs and scavenged pieces, speaks to his resourceful nature; a patched-up jacket, sturdy boots, and a tool belt slung low on his hips, filled with gadgets of his own invention. His unique quirk is a habit of tapping his foot in a rhythmic pattern whenever he's deep in thought, a trait that betrays his analytical mind at work.

Caelus's ambition burns brightly within him—to become a spaceship engineer, a dream that seems within reach when he receives an acceptance letter to the prestigious Orion's Edge Institute of Alien Studies. There, he aims to delve into the mysteries of the universe, particularly the elusive UFOs that have captivated his imagination since childhood. However, the path to his dream is not without obstacles; the institute's rigorous curriculum and the social dynamics of his new environment challenge him at every turn.

At Orion's Edge, Caelus meets a diverse group of friends who become his allies and confidants: Pallas Hart, a sharp-witted girl with a passion for astrophysics; Lyra Peregrym, a quiet yet observant student with a talent for decoding alien languages; Mordecai Aphelion, a boisterous boy who dreams of piloting spaceships; and Fox Scarborough, a mysterious figure with a knack for uncovering secrets. Together, they navigate the complexities of their studies and the mysteries that the institute holds.

Throughout his journey, Caelus grapples with the revelation of his twin sister, a secret kept from him by the orphanage. This discovery propels him into a quest for identity and connection, intertwining with his pursuit of becoming a UFO hunter. His resilience and ingenuity, coupled with the support of his newfound friends, allow him to overcome the challenges he faces, both academic and personal.

As Caelus delves deeper into his studies and the mystery of his origins, he uncovers truths that challenge his understanding of the universe and his place within it. His journey is one of self-discovery, friendship, and the relentless pursuit of knowledge, culminating in a realization that the universe is far more interconnected than he ever imagined.