I found out the XML file that contains codes related to the info dialog.
After messing with the DialogVideoInfo.xml (located in AppData\Roaming\Kodi\addons\skin.aeon.nox.5\1080i), I figured out and realized that this is the part of code that shows Plot Summary in the info dialog.
Code:
<control type="textbox" id="4">
<description>Plot</description>
<left>36</left>
<top>10</top>
<width>1132</width>
<height>400</height>
<font>font15_textbox</font>
<align>left</align>
<label>$INFO[ListItem.Plot]</label>
<textcolor>white</textcolor>
<pagecontrol>-</pagecontrol>
<autoscroll time="3000" delay="6000" repeat="6000">Skin.HasSetting(Enable.AutoScroll)</autoscroll>
<animation effect="fade" start="0" end="100" time="500" tween="sine" easing="inout">VisibleChange</animation>
<animation effect="fade" start="100" end="78" time="300" tween="sine" easing="inout" condition="!Control.HasFocus(900171)">Conditional</animation>
</control>
How I realized was by changing the variables like position (left/top), width, height, font, text color and all. But however, one thing doesn't seem to change, and that is of course the most important thing.. the Plot Summary!! It just won't change to Outline.
I changed $INFO[ListItem.Plot] to [ListItem.PlotOutline], but still it shows the Summary or Full Plot.
Now I am seriously stuck and fed up. For the last couple of hours I have been working on it.
And it doesn't seem like any thing is wrong with Universal Scrapper being not able to scrap the plot outline from IMDb, because when I click on the Plot Summary in the Info Dialog, the Plot Outline can be viewed along with Summary and Tagline. Also, in the same XML file (DialogVideoInfo.xml), I had replaced "ListItem.Tagline" with "ListItem.PlotOutline" at the required places using Notepad++ just to see if the tagline in the info dialog can be replaced by the outline or not. It works fine. So why can't the Plot Summary be replaced by the Outline??
Some one please answer.