Ainsley Kirkpatrick is tired of waiting for Mr. Right to come along. She's ready to become a mother now, even if it means doing it alone. When her best friend and next-door neighbor, Callihan Frasier, finds out she's planning to pick a random donor for insemination, he jokingly tells her that she won't ever find the perfect man in the database because he's not in it.

Ainsley can't deny that Cal really is the total package genetically – he's healthy, handsome, and smart. Cal's definitely not ready to be a father, but he loves Ainsley. In fact, he loves her so much that he eventually agrees to donate his DNA to help her achieve her dream of becoming a mother.

When Cal goes to make his "donation," he gets stage fright, so Ainsley offers him an alternative plan – make a baby with her the old-fashioned way. Cal can't resist the opportunity to finally be with the beautiful woman who has repeatedly shot him down since the day they met.

And while Ainsley expects things to be awkward when the time finally comes to do the deed with her best friend, she's surprised to find out that they have an explosive chemistry together.

The kind of chemistry that threatens to complicate and possibly ruin their formerly platonic friendship.