Touted as “the greatest murder mystery in Marvel Comics history,” Original Sin is the comic book publisher’s big event for this Summer, so get ready to jump on with Original Sin #1, which was released today.

Written by Jason Aaron with art by Mike Deodato Jr., the events of this 8-issue miniseries are prompted by the death of The Watcher Uatu (I know, that’s crazy!). Yes, this is the Watcher, the very first one, the space-god who’s been watching over Earth from the Moon for billions of years – now dead. You can imagine this would stir up some trouble within the Marvel Universe and of course, the superheroes are on the case!

Marvel has released a trailer for the series. Watch the trailer here below, and check out the full synopsis for the miniseries, too.