"My name's Jules. From the window of my Paris apartment, I'm looking in horror at the piles of bodies in the street below. My parents are on the other side of the world. They're almost certainly dead. My older brother, Pierre, can only drown his sorrow in drugs, but I must look after Alicia, a little girl who somehow escaped the virus and is all alone. But what can I do for her? My only hope is to join the other Warriors of Time masters... This meeting is where I'll find out who Khronos really is..."You choose which volume to read first. The first four are parallel stories, so it doesn't matter which one you start with. But you must finish with Khronos, where the four threads are finally brought together.

"My name is Koridwen. I'm the last survivor of a hamlet in Brittany. Before she died, my mother told me about a strange trunk left by my dear grandmother, who was something of a witch. Inside, I found an incredible letter that predicts a magical fate and a crucial mission. But I'm troubled by the similarities between this prediction and the message Khronos sent out just before the internet shut down... This meeting is where I'll find out who I really am..."You choose which volume to read first. The first four are parallel stories, so it doesn't matter which one you start with. But you must finish with Khronos, where the four threads are finally brought together.

"My name is Stéphane. I'm all alone here in Lyon now that my father's been airlifted out by the army. Being a leading epidemiologist, he's probably one of the few adults that are still alive. I've reluctantly gone to a meeting point where all the surviving teenagers are being herded together. I'd like to help with Dad's research into the virus to find out why we're immune to it, but I don't believe for a second that Khronos really sent that message. I'm only going to Paris to find my father."You choose which volume to read first. The first four are parallel stories, so it doesn't matter which one you start with. But you must finish with Khronos, where the four threads are finally brought together.

"My name is Yannis. I'm going crazy knowing that the bodies of my parents and sister are lying on a bed in our apartment in Marseille. I couldn't bury them and now their ghosts are haunting me. Rival gangs have taken over the city and reduced it to chaos. My friend R.V. died in my arms after they shot him in the head. All I have left is my dog, Happy. My last hope is Khronos and his promise to take us back in time and stop all this from happening. I'm going to the meeting to undo the unthinkable."You choose which volume to read first. The first four are parallel stories, so it doesn't matter which one you start with. But you must finish with Khronos, where the four threads are finally brought together.

Yannis, Koridwen, Jules, and Stéphane are Warriors of Time masters, four teenagers who have taken their destiny into their own hands. Their paths cross in Paris, where they are supposed to meet Khronos... But each is pursuing a different goal. Who can they trust in a world that's falling apart? How will they avoid the army and make it to the December 24 meeting? And above all, who is Khronos? What is his plan?"Khronos" concludes this series. Make sure you read the other volumes first. The first four are parallel stories, so it doesn't matter which one you start with.