In 1967, four female scientists worked together to build the world's first time machine. But just as they are about to debut their creation, one of them suffers a breakdown, putting the whole project-and future of time travel-in jeopardy. To protect their invention, one member is exiled from the team-erasing her contributions from history. Fifty years later, time travel is a big business. Twenty-something Ruby Rebello knows her beloved grandmother,...