The Doppelganger

Selena saved Logan's life when they were kids and were inseparable ever since. Until the fateful day when Logan has to move to another country. Before he left, Logan promised Selena that he'll return one day and woo her. Selena wrote Logan a letter and asked her twin sister, Sienna, to pass it to him. However, when Logan asked for her name - Selena's - Sienna gave him her name instead. Ten years later, Logan returns back, determined to find Selena and fulfill his promise to her but instead found Sienna. What'll happen when Selena finds out that Logan has been the boyfriend that Sienna has been talking about and that he was her long time best friend? Is she going to win him back by proving that she's the one he's looking for and not Sienna? Looks like proving Sienna as the doppelganger is harder than it seems.