Businessman and former casino owner Lewis Nelson gives Ray the job of making sure that his wife Lorna, a compulsive gambler, doesn’t visit a casino (where she habitually makes a loss). But she persuades Arthur to do her gambling for her, using her money and her ‘system’. Arthur is initially successful but then the system instructions disappear and he starts losing heavily. To make matters worse, the flirty Lorna escapes Ray’s care and turns up at the casino. Ray and Arthur struggle to get her away before Lewis finds out.