Abby is worried that she will have to be retired.
Whilst Kimmy is delivering the mail in the City of Friends, she and Jumpi accidently bump into each other. Because Jumpi gets hurt, neither of them see a small parcel drop out of Kimmy bag. The parcel contains nails for Bobby’s fence, and because they are scattered around in the road, one by one all the emergency vehicles get punctured tyres. Finally Max is called to the scene in Hayley and it is his detective work that tracks down the nails and solves the mystery of the punctured tyres. Bobby finally gets his nails – and Jumpi finally gets to the hospital to have his grazes seen to!