A parachute jumper meets his death when his parachute is struck by a flock of pigeons, all of which strangely end up dead beside his body. Mac, Danny, and Flack then discover the pigeons were used for racing, but when they track down the birds' owner, they find him murdered inside the rooftop pigeon coop. Stella, Lindsay, and Hawkes investigate when the father of a girl celebrating her Sweet Sixteen is found dead inside the mercedes he bought for her.