One day, the two sisters are playing in the woods behind their house and they come across a strange old house. They decide to go inside and explore. The house is full of strange and wonderful things and the sisters are soon lost in their exploration. They come to a room that is full of mirrors and they see their reflections. But their reflections are different. Morgan sees herself as a beautiful young woman, while Penny sees herself as an old woman.
The sisters are shocked and they don't know what to do. They decide to leave the house and they run home. They tell their parents what happened, but their parents don't believe them. The sisters are left to wonder what they saw and what it means.
The conflict in *All the Lovely Bad Ones* is between the two sisters and the strange old house. The sisters are trying to figure out what they saw in the house and what it means for them. The conflict is also between the two sisters themselves and their relationship with each other.