Junior and Tani are inadvertently trapped while trying to save civilians inside a collapsed road tunnel and having a hard time controlling the panicking travelers. McGarrett and his police dog solve the fatal time lack and Steve discovers that the collapse was an intentional plot for notorious methamphetamine dealer Jackson Wilcox, who got a DEA witness deal, to escape, or rather be tricked by his adulterous wife Shayla's surprising lover Mike. Quinn helps Five-0 discover that the military prisoners van Wilcox was transported in was actually used by the FBI to bring Wilcox from a safe house to treat his cancer. After a bomb is discovered in his home, McGarrett calls the bomb squad to investigate, but they don't get any clues of who could have planted it.
—KGF Vissers