Frank and Betty spend a weekend with her brother George Fisher, who is about to show off his gadget-filled 'fool-proof' home with his partner to a building boss, who may pay George's firm a fortune for the concept. Alas a simple lavatory visit from Frank, who was supposed to remain unnoticed, suffices to start a catastrophic chain of 'accidents', which worsens while they try to cover it up.
—KGF Vissers