Holmes and Watson investigate the murder of a former professional eSports video game player who died after being assaulted in front of his fans during a live video stream. Meanwhile, Shinwell seeks advice from Joan when his teen daughter asks to meet with him for the first time in years.
A kidnapper threatens to start executing his hostages, including Joan, unless Sherlock finds the person responsible for his son’s death within the next 16 hours, when the statute of limitations on the crime runs out.
Holmes and Watson investigate a clown’s murder upstate and discover a connection between his death and the creation of a new weaponized virus. Meanwhile, Joan helps Bell when he’s targeted by his new love interest’s ex-husband, who is trying to sabotage her career at the District Attorney’s office.
Holmes and Watson race to find a woman who has been held captive for years before the kidnapper takes drastic steps to avoid being caught. Meanwhile, Joan becomes frustrated when Shinwell refuses to focus on his informant training.