For her birthday, Kees Flodder Jr. wants a reunion concert for her mother's band, but the members are in jail and have to get out. Meanwhile, Donnie unclogs Charlotte's drain a little too thoroughly, and an alarming neighborhood WhatsApp message causes panic.

Kees Flodder Jr. thinks Uncle Henk is her biological father. Meanwhile, JP and Menno hold Grandma Flodder hostage for ransom, while Donnie, Paultje, and Priscilla dig up dead pets in Eyckendael in search of golden collars.

Eyckendael's benefit match turns into a battle: Kees Junior starts a campaign to keep her mother, Charlotte enlists Paultje Flodder for her project, and JP wants to reclaim the Flodder House by defeating Donnie with oysters.