It has been four years since Bob Moore died in a tragic car accident on a foggy California road. His best friend, Rick, who regularly drives by the accident scene, cannot help but stare at the makeshift memorial that was erected on the side of the road. He desperately misses Bob and wishes for just one more conversation with his funny, humble, and loyal buddy.

While driving by the site one day, Rick is overcome with an uncontrollable urge to stop. After he gets out of his truck, Rick receives the surprise of his life when Bob appears before him. Shocked that he is talking to a spirit, Rick can hardly contain his excitement as he invites Bob in his pickup and heads back to one of their favorite haunts to catch up. After the two pair up, Rick, who is a newly licensed private investigator, begins to rely on Bob for insight. Soon, Bob is helping Rick solve cases. But the tables turn when Bob allows Rick to see other spirits, instigating a journey into the past where Rick connects with his memories and faces his own mortality.

Bobby's Song is the poignant tale of two friends determined to not let death separate them as they slowly learn that true friendship has the power to cross every dimension.