David raskin is high school student who love science. One day he find out that he's dad left a blue print of time machine. so he and his friend build that time machine and using it for fixing the mistake they made in past and sometimes they are using it for their own personal gain. Eventually they find out that the future falls apart with disasters because of the changes they made. Now they realize that it was a very great mistake to build the time machine and they must go back to that time and make sure they never invented the time machine or otherwise they have to face the horrible consciences.