CSI's investigate a truck bomb that explodes on a residential street in Brooklyn, which seems to be targeted at the house beside it. One young woman is found dead in the house. She turns out to be the daughter of Felix Redding, owner of the house and the intended victim. Unbeknownst to him, his daughter was making a surprise visit home from college. Analysis of the bomb connects it to an eco-terrorist group who has blown up a couple of other sites. Mac is puzzled by Redding as a target as he owns a large e-cycling business and is known as an environmentally concerned business owner. Turns out, appearances are deceiving, and Redding has been shipping e-waste to China for disposal, poisoning local villagers, instead of properly handling it and that is why he was targeted. His daughter was part of the eco-terrorist group and rented the van where the bomb was installed, however when she learned her father was the target she raced home to warn him, only to be killed herself.
Danny finally convinces Lindsay to marry him before her trip home to Montana.