The chain of events in a story is the sequence of events, or the plot.
You need jesus! (answers: reading)
Here are two of the four letter words utilizing those 4 letters in a combination that immediately come to mind.
1. grin
2. ring
All of these words have the root word "geo" in it, which means in relation to Earth. Looking at all of these words, their meanings in some way deal with Earth and nature. I hope this helps :)