The Perfect Passion Dating Company at No. 24 Mouse Lane in Edinburgh's New Town is run by Katie Donald who has an innate instinct for bringing people together. She has developed a skill for finding out what it is that people really want. Along the way, Katie learns profound lessons about her own desires as she works at better understanding others.
Although Katie has little in the way of direct experience, with the help of her amiable and handsome office neighbour William Kidd, she soon finds herself making matches for the lonely hearts tired of meeting online - and who want a more personal touch.