As Luna is sprinting through the airport in London, she's worried about missing her flight. But then someone calls for help and since she's a doctor in training, she goes to see what is going on. Luna finds a man who is going into shock because of an allergic reaction. She finds his Epi-pen and is able to save the day. In thanks, her flight is upgraded and she is able to get back to New York. On her way to get on the flight, Luna trips and a man catches her before she faceplants. His name is Jensen and they are immediately attracted. They have a little encounter in the airplane bathroom and then go their own separate ways. Some time later, Luna is starting residency at the hospital and she is running behind. She hurries and trips, guess who saves her again? That's right Jensen, only he's the man who is going to her boss while she completes residency. And he's also a friend of her fathers. Oh, and the father of her three year old daughter. As more secrets come out, can these two find a way to making a go of a relationship?