Seven Last Plagues
"I saw in heaven another great and marvelous sign: seven angels with the seven last plagues - last, because with them God's wrath is completed." Revelation 15:1
In Revelation 14 we have the three angels' messages. Then it jumps to the coming of Christ. Now we go back to fill in the time between the three angels' messages and the coming of Christ. What happens after the three angels' messages have been given? That is the question, and chapter 15 gives the answer.
The three angels' messages were given to call all mankind back to the worship of God. To call mankind to come out of the false religions and churches of the world which do not teach the teachings and Sabbath of God. But they refused. Because they refused, God now pours out His seven last plagues.