When the Grande Hotel is suspected of being the source of a new outbreak of the coronavirus, the Epidemic Prevention Centre immediately ordered for it to be completely sealed off. All guests staying in the hotel are forced to undergo 14 days of mandatory quarantine. Isolated from the outside world, the people began to forge bonds as they reminisced over the normal lives that they have lost.
Chinatown master detectives Tang Ren and Qin Feng, having previously solved cases in Bangkok and New York, are this time invited to investigate a big murder case in Tokyo. At the same time, they will need to compete with other detectives, including one named Q, the current top-ranking detective on the CRIMASTER international detective list.
A family of four lead harmonious and contented lives. When a mysterious visitor starts residing in their basement, their lives are turned upside down as strange events begin to occur.
In the early 70s Hong Kong, corruption was as rampant as ever. Chinese detective sergeant Lak Chui (Francis Ng) colluded with Cripple Ho (Tony Leung Ka-Fai), lord of the underworld, and made billions of dollars through bribery. Lawyer Hank Chan (Louis Koo) despised this kind of illegal acceptance of benefits and believed this deprived the public from fighting for their own rights. His luck came when he met Nash Pak (Lam Ka Tung). Nash admired Hank`s integrity and invited him to join the ICAC (The Independent Commission Against Corruption). The fight between the righteous and the evil has begun.
After a mysterious group of individuals breaks into Laura`s home and attempts to abduct her eight-year-old son, David, the two of them flee town in search of safety. But soon after the failed kidnapping, David becomes extremely ill, suffering from increasingly sporadic psychosis and convulsions. Following her maternal instincts to save him, Laura commits unspeakable acts to keep him alive, but soon she must decide how far she is willing to go to save her son.
Do-hyun is a dedicated English major who enjoys his college life. One day, his professor asks him to help out a newly transferred student undergoing psychological treatment. Through this, he meets Professor Choi, a hypnotherapist. He undergoes a round of hypnosis himself, and wakes up to visions of unknown memories. Around him, his friends also begin to hallucinate strange events and witness mysterious incidents. As his nightmares grow more frequent and more terrifying, Do-hyun and his friends start to question Professor Choi`s intentions with them, and wonder if the truth lies within their newly-discovered unknown memories.
Hannah is a smoke jumper, a trained wildland firefighter who parachutes into forest fires to put them out and get anyone trapped to safety. She is still reeling from the loss of three lives that she failed to save from a fire, when she comes across a traumatised 12-year-old boy with nowhere else to turn.