Frustrated by the loss of their memories, the dream chasers go on a hunt to find the thief. Zoey's convinced the Night Hunter is to blame and ventures to the Grim Realm to track him down, while the rest of the gang finds the Sandman to see if he has any answers.

When the Sandman and the Murky Realm disappear, things get seriously strange. Students start having intense daydreams, allowing dream creatures to slip through the rift in broad daylight! And it's not just any dream creatures, it's the sirens...

When Logan's viral song fizzles out, he's determined to prove he's a serious musician. He unleashes his sick beats on Dream Brooklyn and starts an EPIC dance party! Or so he thinks... Back in Real Brooklyn, Mateo and Izzie become suspicious of their dad's new girlfriend.