You fly to Antarctica and do some zombie fighting and kill Alfred. Before he dies he releases Alexia. You fight Nosferatu, the Daddy Ashford and then gameplay switches to Chris Redfield. You explore the island and get battered by Wesker. You fly to Antarctica in a Harrier Jet and kick some ass. You free Claire but Steve gets infected and turns into some monster and tries to kill you (Claire), but he's killed. Claire cries a bit and then you and Chris go off to kick ass. You take control of Chris, do some puzzling and killing and go on to fight a mutated Alexia in one of the most impressive RE boss fights yet. You kill her and everyone lives happily ever after...
Except when you're leaving Wesker arrives and proceeds to kick Chris's ass a bit. With luck, Chris manages to dislodge some metal girders which crush Wesker... Wesker then gets trapped behind a wall of fire and gives you some "you haven't seen the last of me!" rant whilst you escape. The end. That's the gist of it. You'll be mad that you asked me to spoil it for you as this seriously is one of the greatest games ever.
And then Chris and Claire joins up with Barry, Carlos and Jill, and the five of them forms a mercenary band for hire, with Hunk as the commander in charge, of course. _____________________________________________________________________________ And you have people.. billions of people walking around like Happy Meals with legs.