"turns of plot" is correct and usable in written English.
You can use it to refer to surprises, reversals or unexpected developments that occur in a story. For example: "The movie had several interesting turns of plot that kept us guessing throughout."
His willingness to commit to the most baroque turns of plot feels like a kind of grace.
I rarely gasp at unexpected turns of plot or sigh aloud at a beautiful turn of phrase.
And Mr. Moffat and Mr. Gatiss have given the show some of the freneticism and the mind-bending, confusing turns of plot that characterize "Doctor Who".
Even more admirably, under Kenneth Elliott's deft direction, they make audience members care about the strange characters and odd turns of plot.
Such turns of plot as there are in "Rabbit Hole" are, in description, clichés, involving sibling jealousy, conjugal estrangement, the rivalry of grief and the urge to blame.
The last words of that story -- "I'm coming home" -- have a sentimental ring, and not only because they result from some improbable turns of plot.
Leetch's return was just another turn of plot in a dramatic season for the Rangers.
The spectacle of nakedness at that point eclipses what is meant to be a major turn of plot.
But he's less interested in satire than in hard-won truths, which he teases out by way of a gut-wrenching turn of plot, just this side of tasteless.
One of the most tawdry phrases in the theatre is "We can get away with it", when applied to an inadequate piece of business, or a creaky turn of plot.
But while it's the steamy attraction between Portuondo and Maria Celia that leads to the evening's fateful turn of plot, the real chemistry is between the sisters themselves.
