Agents of SHIELD's Simmons is...well, no one knows exactly where the biochem genius landed in the wake of "SOS: Part 2."

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The ABC drama is intent on giving viewers heart wrenching season finale's for Fitz (Iain De Casestecker) and Simmons (Elizabeth Henstridge) and, after Fitz's recent trials and tribulations, this summer's hiatus will be marred by Simmons' shocking disappearance courtesy of a certain Kree stone.

Unfortunately, not even Henstridge knows what's next for her character - other then the fact that she is definitely not dead.

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"I think I'm somewhere. I think it transports me somewhere. We've had so many theories on set," Henstridge told Entertainment Weekly. These ideas encompass everything from time travel to invisibility to "'What if she's just trapped inside the rock?' That would be terrible. There have been so many theories, but I think it's a transportation device."

To make matters worse, Simmons sudden dematerialization comes equipped with incredibly bad timing. Poor Fitz. As soon as he gets the girl he has been pining after for two seasons, a mysterious alien rock swallows her whole. Typical.

Find out what next for Simmons and Fitz when Agents of SHIELD returns to ABC this fall. Click the video below to see a preview for the season 2 finale.

Tags: Marvel's Agents of S.H.I.E.L.D. television ABC Marvel