In The Third Wheel love is in the air - but what does that mean for Greg Heffley? A Valentines Day dance at Gregs middle school has turned his world upside down. As Greg scrambles to find a date hes worried hell be left out in the cold on the big night. His best friend Rowley doesnt have any prospects either but thats a small consolation. Then an unexpected twist gives Greg a partner for the dance and leaves Rowly the odd man out. But a lot can happen in one night and in the end you never know whos going to be lucky in love.