Teacher Lori Tait has always wanted a family, but now she's 40, she's pretty much decided all the good men are taken. Instead, she devotes herself to her students, particularly one little girl whose struggle with math seems inconsistent with an otherwise brilliant and artistic mind. Mark Wilder hadn't planned to become a father, but when a fling resulted in his daughter, Grace, he whole-heartedly embraced the role. Raised in a family of boys, what does he know about women and girls? Once he learns of Grace's inability to comprehend basic math, he welcomes the role of tutor as a way to connect with his daughter; the opportunity to spend time with her sexy teacher is an added bonus. When Lori cracks the mystery of Grace's problem, Mark's world is thrown into turmoil; he's the last person who can help his daughter. He pushes everyone away, confirming Lori's theory about men. Grace, however, has other plans. Using her new-found understanding of math, she sets out to prove to her father and teacher that, together, they add up to the perfect match.