Living in a quiet village with their overprotective mother, teenaged sisters Calliope, Clio, Melpomene, Terpsichore and Thalia are talented performers with no audience. Then, following a disastrous public performance, their mother reveals a shocking secret: she is Mnemosyne, the Goddess of Memory, and for nearly two decades, she's been on the run from her fellow gods. Before she can share more, she is kidnapped! Under Calliope's leadership, the sisters embark on a journey to save their mother and learn more about their own divine origins. But they'll need to rely on both their individual talents and the strength of their sisterhood to ensure that they ascend from zeroes to heroes-or more accurately, heroines.