We Are Not Strangers explores a unique situation of Japanese and Jewish Americans living side by side in a country at war. Marco Calvo always knew his grandfather, affectionately called Papoo, was a good man. After all, he was named for him. A first-generation Jewish immigrant, Papoo was hardworking, smart, and caring. When Papoo peacefully passes away, Marco expects the funeral to be simple. However, he is caught off guard by something unusual. Among his close family and friends are mourners he doesn't recognize--Japanese American families--and no one is quite sure who they are or why they are at the service. How did these strangers know his grandfather so well?