Plasma balls are dropplets of deconﬁned plasma surrounded by a conﬁning vacuum. We present the ﬁrst holographic simulation of their real-time dynamics via the dynamics of localised, ﬁnite-energy black holes in the AdS soliton background. We consider horizonless initial data sourced by a massless scalar ﬁeld. Upon time evolution, prompt scalar ﬁeld collapse produces an excited black hole that eventually settles down to equilibrium at the bottom of the AdS soliton. The radiation emitted in the process can be described as a superposition of the gapped and discrete set of asymptotic states of the conﬁning phase. We discuss the applicability of hydrodynamics to describe the evolution of the system.