In a near-future Colorado Springs, 13-year-old Nikolas Lyons is determined to finish his homemade time machine and escape Earth for good. But when a mysterious voice starts calling to him from beneath the floorboards, his plans take an unexpected turn. With a snarky nanny drone monitoring his every move and the odds stacked against him, Nick must decide—ignore the voice and stick to the plan, or turn the key and unlock a mystery that could change everything.