The Love Secrets of Don Juan sees self-pitying ad executive Daniel "Spike" Savage midway through a messy divorce at 45. His soon-to-be ex-wife, Beth, has the house in Hammersmith and custody of their daughter, Poppy. Daniel has been left with a bedsit in perpetually unfashionable Acton and a burning desire to understand why all his relationships with women end in miserable failure.