Atm. i'm reading info on Tie::File (which should allow read/write, but i'm not intrested on write to that file).

Than it would seem to me that the tie is not necessary. A quick-n-dirty way would be something like:

my $i = 0; # counter that will increment with each line
my $q = 33;# the line you want
my $line;  # this variable will hold your line in the end

open (FILE, "<$file");
while(<FILE>) {
   $line = $_ if ($q == $i);
   $i++;
}
close FILE;
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But I'm pretty sure there is a "nicer" way to handle this. And I'm quite sure I miss the true question here :(