A cleaner is caught eavesdropping on a confidential business meeting by Mr. Ashford's assistant, who demands her immediate termination. The billionaire Mr. Ashford intervenes, deeming that punishment too harsh. The situation escalates when his grandmother arrives unexpectedly, bringing a stack of blind-date profiles to pressure him. With no time to waste, Ashford makes a sudden offer to the cleaner: pose as his fake girlfriend for three months to appease his grandmother, offering her £2,000,000 in return. Before she can properly respond, news arrives that his grandmother is approaching, forcing him to declare her as his girlfriend on the spot, locking her into a high-stakes agreement.