When his 8-year-old son is abducted, a widowed crime writer looks to his estranged father, a retired former police detective, for help, only to discover a connection with the decades-old case of a convicted serial killer known as "The Whisper Man."

Writer and teacher Iris finds her comfortable, solitary New York life thrown into disarray after her closest friend and mentor bequeaths her his beloved 150 lb. Great Dane. The regal yet intractable beast, named Apollo, immediately creates practical problems for Iris, from furniture destruction to eviction notices, as well as more existential ones. Yet as Iris finds herself unexpectedly bonding with Apollo, she begins to come to terms with her past, and her own creative inner life in this story of healing, love, and friendship.