'Where do you come from?' Peggy asks Tommy. No matter how strong his feelings for her, Tommy can't tell Peggy the truth, because his family all share a secret gift: they can travel through time. His parents Joshua and Lily long to push the boundaries of their talent, crisscrossing through the 20th century on ever more daring adventures. But a freak accident leaves Tommy and his sister Eva alone, grieving, and desperate for answers. Together, the siblings must decide how much the present day means to them, and how far they are willing to travel to hold onto the people they love.