Lizzy, the new teacher of 'Emerald' preschool sends Yossi away from the playroom and out to the yard after he attempted to reach the kitchen by running on top of the nursery's tables. Yossi is a daydreaming adventurous boy, and together with his knight action-figure, Alex, he sits in the sandbox and they decide to save the nursery from the clutches of Lizzy A entire imagined world develops within Yossi's mind, where he becomes a sorcerer and Alex the knight accompanies him on his quest to fight Lizzy the dragon, who overtook castle Emerald Yossi, like a modern 'Don Quixote' that each of us harbors within, only this time reality and imagination crossover to produce a surprising result.