Prezi is gone

I've been working on a prezi the past few days, and this morning i was able to log on and my prezi was there, but now its gone. it just disappeared, is there any way i can get it back?
this was the link that i was able to see it with before: http://prezi.com/ejlwwlyvwfxx/amendments-in-action/ now i cant find it to turn it in,