'We set off in opposite directions and walked around the world until we met, and I'm very pleased we have...' It is summer. Sebastian is in treatment following a breakdown that has left him with a fragile hold on reality and a hunger to connect with the mother who abandoned him. His therapist, Martin, also faces challenges, including his adopted daughter Olivia's tenuous relationship with her biological mother. Olivia, meanwhile, is producing a radio series on natural disasters, which itself seems to be running parallel to the events unfolding in her personal life. Over a year, their fates collide in outrageous and poignant ways, revealing their destinies in a new light. Parallel Lines is a novel about connection, family, love, and the cascading consequences of our choices.