In a not so distant future, where overcrowding and famine have forced governments to adopt a world-wide family policy, seven identical sisters are living a hidden existence and pursued by the Child Assignment Office. The Bureau imposes a strict family planning agenda that the sisters have overcome, but to escape, they claim the identity of one person: Karen Settman. Taught by their grandfather, who grew them up and called them: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday, everyone can go out once a week as a common identity but are free to be in prison own apartment. That until one day Monday comes home, and the investigation of her disappearance involves a very dangerous fight. How will it all end for the seven sisters?