The special task force has received a tip that the central bank is to be robbed. Emil, Liv, and Sam offer their assistance to the special unit. However, instead of the bank, the treasure chamber of the nearby castle is attacked. Just a distraction maneuver? This time, the Playmos are dealing with particularly cunning thieves, and suddenly unexpected things start to happen.

By accident, the Playmos end up in a box in the basement – and of all times, it's Halloween! Emil, Liv, and Sam find themselves surrounded by werewolves, ghosts, and strange figures under the influence of Count Grausich and Countess Gruselia. The Playmos stumble from one precarious situation to the next, but they know how to defend themselves and receive surprising help.