To Reiko it appears pretty strange that her niece died, having a scared face like she saw something terrible. That's when she starts to investigate the case, discovering that some of her niece's friends actually died at the same time and in the same way. When Reiko searches, she finds a weird video tape which she watches, whereafter weird things start to happen. Apparently, the tape is cursed and each person who watches it dies after a week. But when Reiko starts to look into the case, to understand what's happening, everything leads her to a tragic story of a girl named Sadako.
Both are well known horror movies which will surprise you. Both movies contain similar characters as both also revolve around the supernatural. Both are also made by the same producer. In Chakushin Art, you die after receiving a call, and in Ring you die after watching a video tape.