The Book of M.

The forgetting begins when Hemu Joshi loses his shadow in India. Then a boy in Brazil. Shadows disappear from all of Panama seemingly at once. Scientists attempt to learn about the new condition when they match Hemu with an American man with complete memory loss. The symptoms start small, then it's big things, such as forgetting the names of family members, how to speak, and eventually, oneself. After Boston is ravaged by the phenomenon, Naz finds solace in a newly abandoned building; on their mother's orders, Rojan travels from Tehran to find Naz. Together, the siblings flee. Ory and his wife, Max, have been hiding from the plague in the woods for two years when Max's shadow disappears and she runs away. Ory then ventures into the wilderness to find her. Rumors are written on signs and buildings and circle through traveler groups: "The One Who Gathers" is in New Orleans, bad things happen in DC, and don't go near the water.