As the world around them collapses under the weight of a slow, creeping virus that erodes memory, fifteen-year-old Dany and her five-year-old sister are on the edge of their own personal apocalypse - fearing separation at the hands of child services. When a dangerous new strain of the virus emerges, Dany careens headlong into crisis, determined to save her sister. Together with her best friend and reluctant history teacher, they must flee the city. Along the way, Dany faces a series of devastating choices: Can she make the dangerous attempt to break her aunt out of the prison-hospice? And just how much is Dany willing to sacrifice to ensure her sister and her friends survive?

Girl Minus X is a meditation on the gift that is memory and its hidden costs, pitting a fear of forgetting against a desire to erase the past.