As Holmes and Watson investigate a woman's murder, they discover her death is linked to a piece of artwork that has ties to a crime that was committed when she was in college. Also, in the wake of a shocking personal revelation, Watson attempts to forge a connection with a recent client.
Tani and Junior must plot an escape for themselves and several civilians after they become trapped inside a deadly tunnel collapse, while Five-0 investigates the cause and culprits of the cave-in. Also, Eddie the dog uses his field experience and sniffs out a bomb that has been planted in McGarrett's home.
Ella makes the family give up the use of all electronic devices; CJ learns a surprising secret; a Hollywood actor does research at the barbershop for his next movie.
Curtis teaches Jazmine and Malik a valuable lesson on what it means to do without the comforts of home. Meanwhile, the barbers find out that Delante has been living in the barbershop.
Lady Mae wants to preach at women's day but Deacon Sykes is not convinced; Basie wants Jacob to run a new community center that will be built near Calvary; Lady Mae confronts Mavis.
