The sergeant orders Anton to solve the case of prize dog Rexie who disappeared during the dog show. Anton appeals to the Xmix trio. They have a hard time figuring out what happened to the canine champion.
The sergeant charges Anton with the latest case of jewel theft. He sends Xmix to the victim, a baroness who lost a pearl string, a gift from her late husband, while she was at the hairdresser's. The trio finds a suspicious door there, and soon the thief.
Anton passes on to Xmix the investigation of the mystery why it rains during every play recess at a school's play court. The team discovers it's tab-water, not natural precipitation. The answer is outside, in a neighbor's garden.
The sergeants puts Anton on the case of the children's farm, where the mother goats no longer seem to give milk for their little ones. He passes it on to Xmix, who discover fingerprints on the mothers and keep watch until they see the mil being stolen by a fake mailman, who uses it to make goat cheese.
Anton gets a fresh case from the sergeant, which he passes on to Xmix: why did farmer Herman's entire strawberries field died, like his colleagues' fields before, leaving the local shop without supply? Excel's canning show they were poisoned, sprayed by his watering hose, which starts a a pool near a large, neighboring competitor, who breads melon-size but horrible strawberries.
Once more giving priority to a futility, Anton passes on to Xmix the case of the missing statues. Those keep getting stolen from the expo garden, although the sculptor mounts guard day and night. The trio is unable to prevent the next theft by walking about. So they impersonate statues until one of them is stolen- by crane, from the nearby construction site..
Magician Ribaldi has gone missing. Young colleague André alias Roboldi is eager to take his place at the pen-air theater. He charms Xena who gets totally besotted. Luckily Dax and Exel discover he's the kidnapper, but that also brings them all three in danger.
The sergeant hands Anton the case of the three seals, which went missing from the city zoo. Anton gives priority to his Loes's leaking fish tank, so he passes the case to Xmix. After some confusion what seals are, the find a trace of seal sweat-tainted water. It leads to a restaurant, meant as an exotic menu item.
The eggs of the last known Pirapura-bird went missing from the city zoo, just before they would be transferred to the incubator, their container is filled with table tennis balls. Anton gives priority to his girl's arachnophobia-emergency, so Xmix takes the case. The boys man up to overcome their animal phobias, then follow the trail, with surprising results.
Miss Dekkers' bridal dress went messing just before her wedding. Anton is occupied by a neighbor, so the Mmix-team takes over the case. Dax makes candy stains, but just that inspires tracing the thief's, only to find it's not really a theft case, luckily easy to set straight.