Watch Detective Dee: Rats Invasion Full Movie Free Online 123Movies. A rat infestation occurred in the state, the prison collapsed, and Di Renjie was in danger. A large number of villagers were trapped in the city because of the rodent infestation. In order to save the lives of the people in the city, Di Renjie traced the source of the disease. However, as the investigation deepened, it turned out that there was a huge conspiracy behind the rat disaster.