After her man is taken hostage in a botched drugs heist his needy gangland girlfriend must unravel the truth behind what went down if either of them are to make it out alive.

This logine is much better but still needs work.

The two phrases, “her man” and “his needy gangland girlfriend” clash with one another.

When you say “her man” you are making it clear she is the main character
When you say “His needy girlfriend” you are implying he’s the main character.

I would change the word “His” and since you already said it was “her man” you don’t need “Girlfriend” just use “Girl” or “Woman”

I would also stay away from the term (Needy)
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An Example: “After her man is taken hostage in botched drug heist a (New adjective) gangland girl must…”
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One more small thing: When you say “If either of them are to make it out alive” it imply’s both are taken hostage but that line clashes with “When her boyfriend is taken hostage” which imply’s that only he was taken hostage.

I would clarify that in the logline.
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This attempt is really shaping up, now the changes will all be very small and picky. (I am curious what others think)

Hope this helped, good luck!