After all the guests attending an upscale fundraising soireefor the science department at a local university fall ill, theCSI team gears up to investigate. Also, Catherine enlistsGrace's roommate to help her find clues after Grace disappears.
While Stabler is called to testify against the Brotherhood incourt, the task force sets their sights on a dangerouscriminal gang posing as police. Reyes finds a surprisingconnection to the suspects they're after. Bell receives someunwelcome news.
As Tegan and Sara begin writing songs together, they start tobond and grow closer in a way they haven't been all year. Thiscomplicates Tegan's relationship with Maya, as Tegan choosesto spend more time with Sara than with her.