  Using Wilson fermions, we study SU(2) lattice QCD with the chemical potential
at $\beta=1.6$. The ratio of fermion determinants is evaluated at each
Metropolis link update step. We calculate the baryon number density, the
Polyakov loops and the pseudoscalar and vector masses on $4^4$ and $4^3\times
8$ lattices. Preliminary data show the pseudoscalar meson becomes massive
around $\mu=0.4$, which indicates the chiral symmetry restoration. The
calculation is broken down when approaching to the transition region. We
analyze the behavior of the fermion determinant and eigen value distributions
of the determinant, which shows a peculiar ``Shell-and-Bean'' pattern near the
transition.
