The team investigate the motive behind an attack on a senator's daughter. Meanwhile, Kensi's co-worker gives him a gift.
Michael seeks revenge against Whistler and Gretchen and uncovers unbelievable news; Lincoln and Michael are reunited with the gang and get an offer from a Homeland Security agent; Mahone experiences a devastating loss; T-Bag is deserted.
The bodies in the morgue give voice to their own murder investigations as the CSI team try to find those responsible for the killings.
Michael, Lincoln and Sucre have to crash a police benefit to get the next card key; Sarah falls back into an old habit; on his first day of his new job, T-Bag runs into some old friends and arouses suspicion.
