In this upper middle grade sci-fi mystery, fifteen-year-old Owen Thompson has no idea where he came from—or why he was abandoned.

When an antique radio arrives with a cryptic note from an imprisoned uncle he’s never heard of, Owen’s life is upended. The strange device turns out to be tied to Nikola Tesla’s lost experiments and unlocks a secret family legacy that spans generations.

As Owen investigates, he’s thrust into a dangerous time-travel adventure, uncovering Tesla’s groundbreaking but perilous technology—and a conspiracy that cost his grandparents their lives. With help from his loyal best friend Isabel, his science-minded foster father Carlos, and his mischievous foster brother Noah, Owen must confront hidden threats, impossible science, and his deepest fears.

To save his uncle and uncover the truth, Owen must solve the mystery in time—and decide if he’s ready to face what really happened to his family.