"Princess" isn't just any pet. Leonard Goldberg rescued her as a way of coping with his son's death.
The 6-year-old Shih Tzu means the world to him.
"I got her when my son passed away because I couldn't get over it. My son overdosed," Goldberg said. "She's like the greatest therapy in the world."
This isn't the first auto theft Goldberg has experienced.
"I've had my car stolen before and I got it back. I got it back myself," he said.
But this time is different.
He said he left his keys in the car Wednesday evening before pumping gas at the Sunoco on Adams Avenue at Roosevelt Boulevard in the city's Crescentville section.
Goldberg said he thought it would only take a second to pay inside the store, but he later realized it was more than enough time for thieves to do their work.
"I went out there to pump the gas it was gone. And the tow truck driver said, 'Oh, those guys just drove off with your car,'" Goldberg said. "A BMW X3 '07 with 100,000 miles on it."
Goldberg said his heart sank, but not because the vehicle was gone.
"I wasn't worried about the car. It took me 30 seconds to realize the dog was in the car," Goldberg said.
Princess was taken along with the vehicle.
He's asking people to be on the lookout for Princess and is making a plea for her to be returned unharmed.
"We can always go get another car. I can't get another Princess," Goldberg said.
Philadelphia police said they are still in the early stages of the investigation.