A Promise Is A Promise

Hailey and Sam have been away from the boys while they were touring Europe when the boys decided to surprise the two girls by flying them out to London after their tour for the summer, what will happen to Hailey and Harry? Sam and Niall are as strong as ever but will Harry live up to protecting Hailey? Will he keep his promises to Hailey and her friend/ex-boyfriend Jake? What happens when the girls have to leave and start college?