After the world's population is devastated by a killer virus, Cole volunteers to travel into the past to obtain a pure virus sample to help scientists develop a cure

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...