Two girls pick up a fallen alien object, which explodes in their hands.  This gives them the ability to change their size at will, with no known upper limit to how large they can become.  It also gives them complete invulnerability while at any size, even to nuclear weapons.  When the girls grow, whatever clothing they are wearing grows with them and also becomes invulnerable.

This story tries to address the question of how people would realistically behave under these conditions.  This includes the behavior of the two girls, the behavior of the people who know them personally, as well as the behavior of all of society in general.

The story begins as the two girls reach the age of 18 and decide to finally reveal their powers to the world.  How will society adapt to knowing that the entire human race is now at the mercy of two teenage girls?