Marcus spends hours on his smartphone playing high-stakes mobile slot-machine games, especially when he feels lonely or after a difficult shift at work. He believes he has developed a "system" that guarantees a win after a certain number of losses, and regularly boasts to his colleagues that his losses are just "investments" that will pay off soon. He ignores his partner's warnings about their depleting savings, arguing that he is in complete control and can stop whenever he wants.

Marcus seeks help from a clinical psychologist. The therapist aims to challenge Marcus's faulty beliefs about probability and luck, while also recommending a program where Marcus visualizes extreme negative outcomes, such as losing his home and family, whenever he feels the urge to open the gambling app.