In the museum, at night when all is quiet, out pops Maurits Mouse.
He stretches, straightens his collar and smooths down his coat.
He’s heading for his girl with the pearl earring and the sweet smile.
But where is she? She’s gone!
A thrilling adventure:
A dangerous thief is at large in the museum.
How brave are Maurits and his friends?
Do they dare to save the day?