Luciano the cook decides to open a new restaurant by the lagoon. Frida thinks it is a terrible idea because it will spoil the natural place. The appearance of a mysterious mermaid changes everything.
Max wants to cook a yellow Fungi salad to prove Luciano he is also a good cook, and Frida goes with him to the Fungi Plantation. The problem comes when they realize they have lost Pandora, Martha's rabbit, and a real fungi eater.
Frida complains about the food. She would like to eat as good food as they do at Max and Tom's and decides to become the family cook. She will soon realize it is not that easy.
Someone stole Frida's sandwich, then there was a robbery in the Hat Shop and everybody in the Fungihouse in on guard. The strange thing is they only stole some cakes, and no money.
Mr. and Mrs. Hat's babies cry all night and won't let Victor concentrate in his job. He gets desperate because nobody really believes him, except for Max and Frida.
Julia is tinting everybody's hair in blue and Frida thinks she has gone crazy, but it is far from true. There is a much better reason for this new coloring fashion.
Mr. and Mrs. Hat get an extraordinary order from a famous, slightly crazy opera singer. It won't be easy to satisfy her taste. Good that Max and Frida are here to help.