Blair Miller's father, Robert Miller, has recently announced he is dating Liz Hemmings. The mother of heart throb punk-rock singer from the pop-punk band 5 Seconds Of Summer, Luke Hemmings Although Blair and her father live in the Hemmings household, she has never met Luke in person. He's been away with the band. One day he comes home and sparks fly everywhere between them but what he didn't know was that Blair has developed a crush on him. She gets jealous when he brought girls back from clubbing. But what she didn't know was that Luke feels the same way. What happens when Liz and Robert go away and leave Blair and Luke home alone? Will they resist each other? Will Luke become More Than A Stepbrother?!