Dr. Robotnik has returned! His next greatest plan is to manipulate time and space sending Sonic and his friends into a dark future ruled by him. Now Sonic must use the time stones find all the time stones to send him and his friends back and stop Robotnik once again! While Sonic traverses through the past, present and future, he meets a sweet girl obsessed with him named Amy Rose, and a robot duplicate built to rival his original, Metal Sonic!