When a teenage Dick Van Dyke tried to enlist during WWII, his mother made a startling confession: He was actually a year older than he'd been led to believe. She claimed she'd changed his birthday because he'd been born prematurely, but when Dick questioned his grandmother, he discovered the real reason. His parents had conceived him before they were married, and they'd altered his birthday to hide the scandal. But as Dick began piecing together the truth, he realized just how far his family had gone to keep their secret.