Bubbles (aka Undine) is the heroine of this initially gritty, London-based romance. It is also the story of her recent realisation of the fact that she has a condition called Obsessive Compulsive Disorder (OCD), and charts her infatuated relationship with an unscrupulous therapist, Alexander.

Soon the story lightens, along with her personal circumstances, as she meets Gabriel and begins to have happier and healthier relationships with those around her.