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.
It's been a year since the teen-aged parents were brought by Reece and the Quantum Nexis. The Sparticles are being held captive by Queen Kylie for ruining the lives of the kids from the 80s.
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 two parts of the tribe are reunited at the Black Tor Mine for the final stage in their quest. But another tribe is guarding the Sparticle Project and won't let anyone in.
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.
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.
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.