When wanting to create a plot, the very best thing to do is to go back to your character development and know who your character is. Most plots, or at least the first in a series, tend to spring from things in their life and/or background. Now is that everything that there is? Unfortunately, no it isn't. Just because you know their background doesn't mean that you have immediate plot. A plot has to move forwards, sometimes it moves forward based of the character's life. I will summerize the "main plot" i had for "Freedom's Fall" and what it ended up being in the end. Freedom's Fall started with Captain Kate Almir commanding a ship looking for colonizable worlds, running into a alien space craft destroying them. That lead her into a conspiracy to overthrow the government, a betrayal by them to an old enemy of hers, her escape, stealing of a ship based off the alien technology and boom! move to the second story...not quite. Simple enough plot, not enough meat, by adding "back story" into hr background and HOW she got to that point, it became a fleshed out plot. I won't give play by play, but here is how to new one is. I have a theme I believe in, but the reader can develop many more from the book. Mine is the danger of how history repeats itself, so I try to retell the falling of the German Weimar Republic and the rise of Nazism, causing WW2. But then one can draw off it several current social themes too, so I leave that for the reader to interpret. Plot follows like this ch1-introduction of Kate Almir, her injuries, the cybernetic replacement Surgery, introduction of Rear Admiral Reyes, and the doctor hints of things to come ch2-her awakening learning, the consequences of the surgery, emotional response ch3-sniper training, first signs of some of her negative character traits ch4-sent on mission to save President from Terrorists ch5-first half of mission ch6-second half ch7-sent to kill someone involved in above, and personal consequences end book 1 ch 8- reaasigned from intel cha9-new ass cha10-transporting herslf there, being known by the conspirators...plans to try to kill he again ch11-fleet ambushed, dogfight against old enemy, ch 12-shot down, pursued, survival, end book 2 chap 13-commanding vessel, getting distress call chatp 14- finding distress vessel, learning something bad cha15-tracking down what she suspects ch16-barely escaping trap chap17-sent to interview witness far from earth chap18-betrayal by conspirators to another old enemy end book 3 ch19-back into past situation in present life ch20-facing inner demons from trauma ch21-escape ch22-breaking friend out form prison ch23-stealing prototype chap 24-climatic battle end onto next book each book has it's on climax and plot, but they all tell a different point of my character's life, and how it ties into the end, which is present day. Al while following the theme of the Weimar fall. try to make sure your plot somehow ties directly with the background of your character, and you will most likely be ok. Everything boils from the character(s) and that is where you start first, 'cause once you have that figured out, the story comes naturally. the old saying that your character will tell you how their life goes is very true.