In this paper, we discuss the assemblies of chiral molecules which are in contact with a metallic thin film. In a combinatory system of chiral molecules and a metallic structure, an interaction between excitons and plasmons can alter the circular dichroism of chiral, molecular dipoles. Our results show that in reflectance configuration, we have sufficient exciton-plasmon coupling and also in the transmittance experimental setup, the change in the circular dichroism is observable in all-visible spectrum due to this coupling.