Fractionalization is a phenomenon in which the elementary excitations of a many-body system are made by breaking apart the constituent degrees of freedom. For instance, in the quantum Ising chain, the elementary excitation is a domain wall, also known as a spinon, which can be thought of as half of a spin. While local external perturbations may excite phonons and magnons from the vacuum one at a time, the spinons must be created in pairs. As a result, in dynamic probes including neutron scattering and electron spin resonance, the spinons appear as a broad continuum of signal rather than a sharp resonance. The spinon continuum hides the intrinsic spectral properties of spinons such as their line width and line shape, thereby concealing the spinons’ dynamical properties. In this talk, I will show that two-dimensional coherent spectroscopy (2DCS) is an ideal tool to analyze the dynamical properties of fractional excitations. Using quantum Ising chain as a prototypical example, I show theoretically that the 2DCS can resolve the spinon continuum and directly reveal the lifetime of a pair of spinons. This is possible thanks to the spinon echo process, which is an incarnation of the photon echo in the context of spinon dynamics.