  We introduce a family of partially entangled thermal states in the SYK model
that interpolates between the thermo-field double state and a pure (product)
state. The states are prepared by a euclidean path integral describing the
evolution over two euclidean time segments separated by a local scaling
operator $\mathcal{O}$. We argue that the holographic dual of this class of
states consists of two black holes with their interior regions connected via a
domain wall, described by the worldline of a massive particle. We compute the
size of the interior region and the entanglement entropy as a function of the
scale dimension of $\mathcal{O}$ and the temperature of each black hole. We
argue that the one-sided bulk reconstruction can access the interior region of
the black hole.
