Mateo is a completely normal boy who one night realizes that he must assert himself as the defender of dreams against the Nightmare King and his nasty machinations. But are his dreams really just dreams?
When Mateo's comic creation Z-Blob follows him from a dream back to Brooklyn, Mateo and his sister realize the Dream World is real and in danger.
After a daring mission to save their friend in the Dream World, Mateo and Izzie realize the nightmare has followed them back to the Waking World.
To craft their own hourglasses and become official Dream Chasers for the Night Bureau, Mateo and his friends must defeat the Dream Forge guardian.
As time runs out to face the Dream Forge and become official Dream Chasers, Mateo and his friends enlist the help of the mysterious Dream Bandit.
The search for the Sandman leads Mateo and the others to the tallest mountain in the Dream World, but Lunia's hourglass puts a target on their backs.
A surprise visit from the Chief Inspector of the Night Bureau forces Mateo to hide Z-Blob, who goes on an adventure in the heart of Brooklyn.
A rivalry develops between Logan and Mateo in the cyber world over a computer game. And the Nightmare King has his fingers in the pie.
The Nightmare King takes advantage of Logan's weakness in wanting to please the other Dream Guardians and manipulates him.
Logan's desperation to prove himself leads to his capture by the Nightmare King, which leaves his friends to face the Sheep Week finals alone.
The Dream Chasers rush to save Logan from the Shadowkeep's dungeon, but the liberators soon become the prisoners in a nightmarish twist of fate.