The tribe are falling apart and Holly decides to end the quest by selling the key to Fizzy. Sadiq realizes that the key fits a stone head and challenges Fizzy for the chance to win back the key, the stone head, and Reese's freedom.
The Sparticles need to translate the message on the stone head, but the museum is locked down. Rocky offers to help as he wants to steal gold to pay for fuel. Holly and Serena offer the museum Fizzy's protection in return for the decoder.
The Sparticles find themselves in a circus and pose as clowns to avoid trouble. Serena's sister points her to a chalk horse where they find the next clue - an old sword. Holly gets trapped underground and needs Sadiq's help to get out.
In Peace City, Sadiq is mistaken for a dance star and Reese meets a boy with similar powers to her own. Fizzy offers a massive reward for capturing the Sparticles, but when that doesn't produce results he decides to take over the city.
According to rumors, Watermint Mill is home to a child-eating creature. Serena and Holly discover that the stone head also has a body, while Reese and Huen are drawn to the creature, sensing that it has powers like theirs.
Jeffrey is stung by a poisonous plant and needs an antidote that is held in a castle guarded by a tribe of knights. The Sparticles must compete in a tournament to win back the sword. Reese discovers that someone is blocking her powers.
A tribe of traders imprison the Sparticles, accusing them of stealing a shipment of chocolate intended for Fizzy. Reese's powers are increasing, but the rest of the tribe aren't happy to discover that she can control them.
The race is on to assemble the Statue of Artos in time for an annual ritual, but Ernesto has decided that his revolution will be easier without the adults. Reese has an out-of-body experience and is reunited with Muna.
Tensions are rising as the race to the Quantum Nexus nears its end. The sword shows Holly the way and Serena leaves a trail for the Sparticles. Believing that realigning the worlds would be dangerous, Reese teams up with Ernesto.
Arriving at the Quantum Nexus, the Sparticles are greeted by a holographic version of Doomsday Dora, who explains that they can identify the right dimension to bring their parents back, but Reese's sabotage attempts cause a malfunction.
