Samantha and Tracy have been best friends since kindergarten, but now that Tracy has gotten over her shyness and made new friends, Samantha is feeling left out. This is nothing compared to how she feels when a strange girl named Jessica tells Samantha that she’s actually an imaginary friend. Tracy has outgrown Samantha, and it’s time for Samantha to help another child who needs her. But will Samantha be able to move on and fulfill her duty as an imaginary friend?