Eternal Echo (1970)

Sinopsis

When two paranormal investigators are called to a remote forest villa to debunk a haunting, they find themselves trapped in a time loop where each night ends in violent death – and each day resets like nothing happened. As cryptic messages appear in the mirrors and reality begins to fracture, they uncover the presence of a forgotten boy whose tragic past holds the key to breaking the cycle. But the arrival of a violent outsider – and his terrified captive – threatens to tear the loop apart before the truth can be revealed.