Complex sentence: Back in the bunker it's shift change and the soldiers come to get the others discovering they are not there and have wandered into the tunnels, the group suspects them of deserting and follows them into the tunnels to capture them.
Split into simpler sentences: Back in the bunker it's shift change and the soldiers come to get the others discovering they are not there and have wandered into the tunnels. The group suspects them of deserting and follows them into the tunnels to capture them.