Death is the seperation of the soul.
Immediately after death, the soul is judged.
If you die in mortal sin, you go to Hell.
If you die in sanctifying grace, you go to Heaven.
If you die in venial sin, you go to Heaven, but are purified of your sin in Purgatory.
There will be a great apostosy
The Antichrist will be worshipped as God
The Church will be persecuted
Jesus will come again in glory to judge mankind
The dead will be resurrected and judged
The wicked will go to Hell, the righteous will live and reign with God forever
His Kingdom will have no end