When a vengeful physicist captures Agent Six of Hearts and blasts him backwards through time, he has one chance to prevent her from unleashing a catastrophe. If he can find and destroy the components of her time machine, he can stop her from ever building it - but the components are under lock and key. Luckily, he crosses paths with teenage super-thief Ashley Arthur. Unluckily, she has her own agenda...From the award-winning author of MONEY RUN and THE LAB, CROSSOVER is a non-stop roller coaster ride through spacetime.