A scheme on unidirectional reflectionless propagation is theoretically investigated in a plasmonic waveguide system which consists of two metal-insulator-metal (MIM) stub resonators side coupled to an MIM plasmonic waveguide. By appropriately tuning the phase difference between two stub resonators. unidirectional reflectionless propagation at exceptional point. phase transition. https://www.isyeriacilisi.com/product-category/jack-in-the-box/