We propose a new theoretical framework—Temporal Dynamics—in which particles evolve deterministically within highly compressed internal time domains. In this model, small systems experience accelerated time flow relative to global time, leading to observable behavior that appears probabilistic or discontinuous in the external frame. We simulate this compressed evolution across a set of oscillating particles and demonstrate how internal deterministic processes can produce reproducible but classically unpredictable outcomes. These mismatches emerge not from intrinsic randomness, but from causality occurring too rapidly to be resolved in slow time. We introduce the Real Evolutionary Record (RER) as the hidden timeline of internal evolution, whose structure governs the apparent unpredictability observed during measurement. Temporal Dynamics does not attempt to replace quantum theory, but offers an interpretive basis for understanding how reproducible randomness can arise from time-dependent determinism beyond classical resolution.