Sasha Pieterse plays Allison Pieterse the 20 year old girl who studied In Manchester London with Eleanor Calder. She had also known Louis Tomlinson as a child, and truly loved him. But, slowly they grew away from each other after he moved. She remember most of the things that happened as a child since the recent car crash took over little of her childhood memory. Until, her parents agree on letting Louis take Allison with him for 6 months, she regains all of her memory. She finds out that Lou and Eleanor are dating and seems to be jealous in the beginning. But what if she meets someone along the way? Niall? Harry? Beach Boy? You'll just have to see