Tang, Panzee and Drum have come up with a great tune for today's Big Zing but Zak just can't think of any words to go with it. He suggests he plays the only instrument he can play instead - the harmonica - but Tang points out that Zak lost it last week! Zak is at a complete loss and announces that he will not be in the Big Zing. This is a disaster so Todd sets to work making a new instrument for Zak to play instead. In the meantime DJ Loose introduces Zak to Cleo Laine and the art of scatting. Zak loves the way she makes up special words which match the music and decides that he's going to Scat in the Big Zing. Before he has a chance to practise though Todd arrives with his newly invented instrument. The wheezing sound coming from the instrument is so loud Todd doesn't hear Zak explaining that he doesn't need an instrument now - he's going to scat instead. But it's too late, Todd has wrapped the instrument around Zak and left him to practise. Luckily DJ Loose comes to the rescue again and helps untangle Zak from the odd instrument. Zak starts to practise scatting but just can't seem to get it right. When the machine begins to make even more odd, but rhythmic, sounds Zak starts to mimic it and quickly finds his scatting vibe. The other ZingZillas love the sound of his scatting and think it's perfect for the Big Zing.