Niall Horan is the only member of the British boy band - One Direction - who is always single. And that's one of the many reasons why their fans love him. Even though his record in the 'love department' is quite empty, he believes that one day, he'll find the girl who'll make him fall madly in love. But all that changes when he meets his "summer love" - Scarlet Heatherton. It all goes back to the summer of 2014. The summer where Niall had gone home to Ireland and met Scarlet - the happy-go-lucky girl who brought out the best in everyone. It's the summer where he fell so deeply in love with someone who had secrets of her own. Secrets that shattered his heart into pieces like glass. And the summer where he promised himself that never in a million years, will he ever fall-in-love again. But what happens when fate makes them meet again? Will Niall's feelings for her that are buried deep down, start resurfacing? Will Niall's promise to himself be broken? Will he fall-in-love again with the same person who broke his heart a year before? Or will he be strong enough to fight the feelings he has for Scarlet in order to save himself from another crucial heartbreak? Everyone has their own story about their "summer love". Well, this story is all about Niall's. Read on to join Niall and Scarlet in their journey that's full of laughter, happiness, romance, cheesiness, sadness and tears.