Something doesn't add up...

Lydia's looking for a job not a lover, but after her interview at Saint Joseph's University, she ends up with both. There's a need for discretion despite her bright pink hair and Doctor Spencer Flynn's candy apple red Mustang—after all, she's an admin assistant now, he's a lecturer in applied mathematics and they work together. So they conduct their liaisons behind closed doors, which is all right with Lydia—she's never experienced chemistry like it.

'Discreet' soon begins to look a lot like 'secretive' and a last-minute cancellation of a date prompts Lydia to rethink her role in the relationship. Braced for a break-up, she's amazed when Spencer confesses the secret he's been keeping all along. His loyalties are divided and when Lydia's attempts to hold on to his attention backfire publicly, she wonders if playing house with a mathematician is a zero-sum game...