Mr. Taschenbier, who had previously led a rather unremarkable and monotonous life, becomes suspicious when a big thunderstorm suddenly appears on Thursday. After all, the sun had shone on the previous Sunday, Mr. Mon visited him on Monday, and on Tuesday he was on duty as usual. That would be so far admittedly still nothing special, just as little the middle of the week on Wednesday. On Thursday, however, there is thunder. And when Mr. Taschenbier then also has Friday off, he goes into town on Saturday, curious about what might await him. In fact, he encounters a creature that none of the other passers-by can make sense of. Only he logically suspects that it must be a "Sams".

Mr. Taschenbier hopes that Sams, that little cheeky, gluttonous, yet lovable green creature with the red hair and blue dots on his face, will come back soon and stay with him forever, once the wishing machine has been set in motion. But, on Sunday the sun must shine, on Monday Mr. Mohn must come to visit, on Tuesday Taschenbier must go on duty, Wednesday is just there, there must be the middle of the week, but Thursday is difficult, because there must be thunder, and Friday must be a day off. But one day it works out, the Sams is back and the wishing machine works. But now one disaster after another happens.