So Mackensie is the photographer for Vows, the wedding business she started with her three childhood best friends. She has an insanely disfunctional relationship with her manipulative mother, and is ambivalent about her historically absent father. So as a result, Mac is one of those tedious women from chick lit books who's incapable of having a healthy adult relationship with the opposite sex, because she's too afraid of getting "hurt". To quote Rayanne Graff on My So-Called Life: "Anything causes a scar. Living causes a scar. My mother has a humongous scar from having me. Does that mean that I should have never been born?"
Enter Carter, a high school English teacher who's had a crush on Mac since they were teenagers. He's far too nice, and well adjusted for her. But he wants her anyway. The usual roadblocks get in the way, but guess how it ends?
Since this is the first in a series, it's a lucky thing that Mac's best friends and business partners are entertaining and likable women (they'll be the subjects of the subsequent novals). Though it's a little hard to buy her relationship-phobia when she's able to have such long and healthy relationships with her friends.