Astrolia: When a man goes missing on an archaeological dig his brilliant but narrow-minded niece discovers his secret double life and her own connection to an ancient prophecy in a world she never knew existed.

The description of each element must be heavily pregnant with information for a logline to be effective, yet there is a severe lack of detail in this logline.

Here is an example: "...When a man goes missing..." means very little when first read as it describes half the human race. Later in the logline it's revealed that this is, in fact, the uncle of the protagonist. Why not describe him as who he is i.e; After her uncle goes missing...

The lack of clarity aside, the plot is vague - what does she do? What is the MC's goal after the uncle goes missing she needs to act but it isn't clear, from the logline, what her action will be. All story mediums film, TV and web series need a main character in pursuit of a goal, what's hers?

Another thing you could do to polish this logline: A logline should be written from one point of view, You begin from the uncles point of view then switch to the Nieces point of view.

Here would be an example of beginning your logline from the point of view of the lead character
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"When her uncle goes missing while on a dig, a brilliant but narrow-minded archaeology student must..." (Then tell us what path this event sets into motion for the lead character)
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>>Actually, your guess is incorrect. The discovery is actually the catalyst for the rest of the season and is revealed in episode 2 which is the second half of the pilot.

Okay. What part of the discovery is revealed in the pilot episode? ?That he's living a double life? Or her own connection to an ancient prophecy? ?Both?

I still think the logline needs a polish. ?However, if this version gets the read and sold, then mission accomplished and I'll be happy to have been proven wrong.

>>>based on a novel that I decided not to publish

If the novel were published that could be an even more effective promotion than a logline.

Just saying.