Thea and Isaac first met at University. Theirs was an instant connection but it never went further than friendship. Because, then and now, Thea only has eyes for her work. Not just her course, but also a private project - Thea is determined to prove that time travel is not just the stuff of science fiction. And she has never told anyone the reason why. When one of their friends goes missing in an experiment, Isaac and Thea must work together to find her - forcing them to re-examine their own friendship. Is it really as platonic as they used to think?