In a dim Latin classroom where time refuses to move forward, Mara Vale is tasked with observing a student who only speaks in dead languages. But as his translations begin to reveal names, memories, and truths no one should know, Mara uncovers a buried experiment—one that binds minds across generations through grammar itself. As the past bleeds into the present and language begins to reshape reality, she must confront a terrifying choice: preserve knowledge at any cost, or break the chain before it claims her voice as its final form. Some lessons are never forgotten. Others refuse to end.