Perpetually single Frankie decides to give up on men in favor of going all-in as a “dog mom" to her adopted dog, Tucker. But sparks fly when Frankie meets Jack, the veterinarian who rescues her dog from near death. They seem destined to be together, but there's one problem: Jack is already engaged.

He has shared our lives for 20,000 years. Along the way, he has helped us find food, kept our livestock, protected us from our enemies, guided us in extreme conditions, and saved us from peril. Now, he comforts us, relieving loneliness and helping us cope with old age. How did dogs come about?