/usr/lib/x86_64-linux-gnu/libplist.so is in libplist-dev 1.12+git+1+e37ca00-0.3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libplist.so.3.0.0
/usr/lib/x86_64-linux-gnu/libplist.so.3.0.0