Don Tillman – scientist, husband, father, and world’s greatest problem solver – met his wife Rosie by inventing The Wife Project. But ten years on from marrying ‘the world’s most incompatible woman’, Don is facing a set of human dilemma tougher than the trickiest of equations.

Don and Rosie’s son, Hudson, is smart, but he’s not fitting in at school. His teachers want an autism assessment.

That leaves Don facing some tough questions. Is the man with a rational approach to everything ready to tackle big truths about his son, himself and his own childhood?