  In this paper, we introduce a notion of adjoint ideal sheaves along closed
subvarieties of higher codimension and study its local properties using
characteristic $p$ methods. When $X$ is a normal Gorenstein closed subvariety
of a smooth complex variety $A$, we formulate a restriction property of the
adjoint ideal sheaf $\adj_X(A)$ of $A$ along $X$ involving the l.c.i. ideal
sheaf $\mathcal{D}_X$ of $X$. The proof relies on a modification of generalized
test ideals of Hara and Yoshida.
