Set in contemporary London, “Cassandra’s Dream” is a powerful and thrilling story about two brothers (Ewan McGregor, Colin Farrell) who are desperate to better their troubled lives. One is a chronic gambler in debt over his head, and the other is a young man in love with a beautiful actress (newcomer Hayley Atwell) he has recently met. Their lives gradually become entangled into a sinister situation with intense and unfortunate results.