Mia, an overweight girl, mistakenly believes her college heartthrob boyfriend, Ethan, is ashamed of her and walks away, crushed by insecurity. Seven years later, she's transformed into a stunning, icy beauty named Evelyn, raising her daughter alone. Desperate to pay for her daughter's eye surgery, she reluctantly agrees to become Ethan's substitute girlfriend for three months. As they grow closer, Ethan notices Evelyn's habits are eerily similar to those of Mia, the woman he's spent years searching for in vain. Torn between resisting his growing feelings and falling deeper for her, he has no idea that the woman he's never stopped longing for has been right in front of him all along.