The team must unravel the series of events from a wild night for a group of friends--a night which ended in four dead bodies, and a fifth person wandering the streets covered in blood and wielding an ax.
On the night of a young man's 21st birthday, his friends take him out to celebrate, but when they turn up dead and he's found walking in the middle of the street covered in his friends' blood and wielding an axe, the CSIs must trace the events of the man's wild night to figure out just what happened.—CBS Publicity