Both movies will premiere in January
The official website of the anime of Made in Abyss has uploaded some enw promos for the compilation films which will premiere at the beggining and the last days of January.
A second season is also in the works and slated for 2019.
Anime News Network describes the story as follows:
“In the story, an enormous pit and cave system called the “Abyss” is the only unexplored place in the world. Strange and wonderful creatures reside in its depths, and it is full of precious relics that current humans are unable to make. The mysteries of the Abyss fascinate humans, and they head down to explore. The adventurers who venture into pit are known as “Cave Raiders.” A little orphan girl named Rico lives in the town of Ōsu on the edge of the Abyss. Her dream is to become a Cave Raider like her mother and solve the mysteries of the cave system. One day, Rico starts exploring the caves and discovers a robot who resembles a human boy.”
Via: Anime News Network