India, Oct. 8 -- This article contains major spoilers for Chicago Fire Season 15 Episode 1.

Chicago Fire Season 15 wastes no time answering the biggest question from the Season 14 finale: everyone from Firehouse 51 survives the warehouse fire. But that does not mean everyone gets out unscathed. Joe Cruz is the one who pays the biggest price.

After staying behind to rescue trapped civilians, Cruz is crushed by falling debris and suffers a serious spinal injury. Three months later, he is still in the hospital and unable to walk. And the ending delivers an even more devastating blow. Cruz learns that even if he eventually walks again, he will not be able to return to firefighting.

Here's what happened to Cruz and what the Chicago Fire Sea...