Jericho's hero -- Captain Ross (a.k.a. you) -- gets into a bit of trouble early on and actually has to sacrifice himself in a noble way. But due to various circumstances that you will presumably learn about as you proceed, he doesn't just die like a normal man would. Instead, he becomes a spirit that can jump between members of his (former) squad and take over each of them.
That's the setup for this horror-filled squad-based first-person shooter from Codemasters (publisher), Mercury Steam (developer), Alchemic Productions (facilitator), and Clive Barker (storyteller).