A synopsis is a reasonably brief explanation of the story. You don't need dialogue or much (if any) of the smaller issues of the plot.
A synopsis for Macbeth might be:
A Scottish lord is told by 3 witches that he will become Thane of Cawdor. When this happens, his ambitious wife, wants him to become King and persuades Macbeth to murder the present King, currently staying at their castle. After this is done, both deteriorate mentally. They hallucinate but Macbeth believes he is invincible as the witches said 'no man born of woman' could kill him. Macduff, whose family Macbeth has slaughtered, was born by Caesarian section does kill him. Lady Macbeth goes mad.
Imagine answering the question: 'What's he story (or book) about?' And answer just as you would if you were talking to someone. When submitting a manuscript to a publisher, look for, or ask about submission guidelines. Some publisher want 2 A4 sheets of synopsis. Rarely, if ever, would you write more than 4. Less is definitely better in all senses.
Typically, a synopsis is single-spaced with a space between paragraphs. This format helps make the synopsis easier to read and allows for more content to fit on a page.
No, websites are not italicized in APA format.
Abbreviations allowed in APA format are acronyms.
Yes, articles are italicized in APA format.
Yes, titles are italicized in APA format.
Yes, the title is italicized in APA format.
Yes, I can write your paper in APA format.
In APA format, articles are italicized, not quoted.
Yes, in APA format, book titles are italicized.
No, website names are not italicized in APA format.
Yes, the edition should be italicized in APA format.
In APA format, 11 is almost always written as 11.