Bing and Flop find a lost dog in the park. After Flop shows Bing how to make friends, Bing falls in love and decides he wants to keep her. When the dog's owner turns up, Bing finds it hard to say goodbye to his new friend.
Bing and Flop are in the park, when a doggie comes to play catch with them. Bing loves playing with the doggie, and wants to keep her. Bing learns the doggie's name is Sunshine, she is Popsie's sister and Gilly and Popsie are looking after her. But what happens when Bing realises he can't keep Sunshine?