Three caretakers and a single remaining researcher, who keep the Northern Institute in working order in case research ever resumes, find their work upended by a mysterious object that appears in the snow that soon challenges their every notion of what isnormal.

In ordinary times, Tola lives in an apartment in Lagos, Nigeria, with her clever sister, Moji; her sporty brother, Dapo; and bossy Grandmommy. Tola is so happy! But news of a new virus—and a lockdown, too—sends Moji away in one direction and Dapo in another. Then, when Grandmommy can no longer go out to work, Tola goes instead. She works for the wealthy Diamond family and makes new friends among the household staff. But even the wealthy have problems—and...