Maya and some of her colleagues find a mysterious musical score that grants them strange powers; the kids are unable to control these powers and the situation becomes very chaotic.

After a message from Leo, Maya remains obsessed with investigating further; in a vision, Maya finds a new clue on Leo, while Rafa discovers how Connie's power works and becomes a dangerous threat.

While Maya investigates the strange key found in Leo's backpack, the kids try to return the metronome to the museum; as everything starts to go wrong, they run out of their powers and must find another way out.

The kids spy on Gael; they're sure he's hiding something about Leo's disappearance; Tenoch doesn't get along with Pepe, his roommate. Paulina discovers her superpower; the kids follow Gael around the city and discover that he has a big secret.

Rafa enters the attic, stays by Connie's side and gets on the kids' nerves; they, in turn, find Leo's notebook, which may be a key to understanding what's going on; at the same time, they try to find a way to find out what Gael is hiding.

The kids discover that Gael didn't harm Leo; Max can't afford the conservatory tuition and needs to raise money; Tenoch discovers something revealing about the Theremin; the villains group together, ready to attack.