A young couple's love is put to the biggest test when war breaks out and tears them apart in the first trailer for How I Live Now, the latest from director Kevin Macdonald (The Last King of Scotland). The story centers on Daisy (Saoirse Ronan), a young American sent to live with relatives in the U.K., where she falls for her new neighbor Edmund (George MacKay). Their summer romance is put to an abrupt halt when war breaks out in the peaceful British countryside. The drama is scheduled to open in U.K. theaters October 3, but a U.S. release date has not been announced yet. In the meantime, take a look at this footage, co-starring Tom Holland and Anna Chancellor.