My 'Check' function is not working properly?

You created a function inside of an if statement, you don't really need the function in the first place, and even if that did work, you have executed the function outside of the if statement you were intending it to be in.

script.Parent.Touched:connect(function(hit)
    if hit.Parent then
        local hum = hit.Parent:FindFirstChild("Humanoid")
        if not hum then
            print('Wasnt a humanoid')
        else
            local egg_plot = game.ServerStorage.Egg_Plot:Clone()
        egg_plot.Parent = game.Workspace
        local already_in_workspace = game.Workspace.Egg_Plot
        if already_in_workspace.Parent == game.Workspace then
            egg_plot:Destroy()
        else
            print('there wasnt an Egg Plot in workspace')
        end
    end 
        end
    end
end)

And that's all that it needed. Hope this helped!