The Sparticles and Holly and Serena arrive at the museum where the stone head belongs and plan to decode the message on the Stone Head, but the Sparticles get caught up in a plan with another tribe, the Featherheads to raid the museum in order to get gold to melt down to turn into Fizzys to use to buy fuel. Holly and Serena break into the museum and use the decoder to translate the message on the Stone Head, which was written on a piece of paper that they stole from Reese. While Jeffery and a member of the Featherhead work on a machine turning waste into fuel, the remaining Featherheads rob the gold from the museum, including the Decoder. Reese attempts to get it back but is caught in the diggers bucket and is nearly killed. The Sparticles chase the digger down the road but it gets stuck and Reese drops the Decoder. The digger destroys the Decoder and Rocky drops the bucket and lets Reese out. Before they leave, Reese reveals that before it was destroyed, she saw the message decoded. They leave, and Rocky's brother finds a note stating that he has stowed away with the Sparticles to get their mum back.