[OH&S]

Use the better translated synopsis:

Spoiler:

Kamijou runs through frigid LA to reclaim the bond between mother and daughter!!

Argh, I'm gonna freeze to death, dammit!
After somehow escaping his hospital bed, Kamijou Touma finds himself in Los Angeles!?
It should be warm, yet it's freezing, and the entire population is missing!?
Kamijou and Index work together to fix this abnormality caused by Anna's R&C Occultics.
After evading an attacking magician, they find the one survivor - a silver-haired, brown-skinned little girl - and the "traces" of her mother.
Once Kamijou takes on the mother and daughter's feelings, he can break through that darkness!!