Jon Arbuckle plans to propose to his girlfriend, veterinarian Dr. Elizabeth "Liz" Wilson, who is going on a business trip to London. Jon follows Liz to the United Kingdom as a surprise; after escaping from a kennel, Garfield and Odie sneak into Jon's luggage and join him on the trip. Garfield and Odie break out of the hotel room due to boredom, and subsequently get lost in the streets of London.