The Chocolix family has just moved from the Kingdom of Chocolovely to the Kingdom of Chocoland; the parents are happy with the change, but their children, Chocomark and Chocolyne feel unsure.

Chocomark and Chocolyne go to the aquarium on a school trip; Chocolyne takes Sweetcookie, the family's pet dog, hidden in her backpack; there, they meet little Max, who is sad and feels rejected for being little.

Chocomark is having nightmares and is afraid of sleeping; but, overcome by sleep, he has an incredible dream with a Monster that takes him to the Monster Kingdom.

Chocomark and Chocolyne receive a call from their grandmother Tita, inviting them to an exhibition at their old school in the Kingdom of Chocolovely.

Caramel, Chocomark and Chocolyne's classmate, says that during the weekend she went to see the Blue Chocolate Lake, a wonderful place that had the purest edible blue chocolate that existed.

Don Cacao decides to throw a party for all the friends of the Kingdom of Chocoland in return for the warm welcome his family received; Mrs. White will serve chocolove to all the guests, a recipe that is a family secret.