Harley and Roger place the airport under security lock-down as the baby-sit a group of FBI agents and their star witness Vanessa on her way to testify in federal court against her drug-dealing boyfriend. However, when the witness disappears from her flight shortly after leaving the gate, the LAX co-chiefs race to find the missing girl before she can be silenced. Meanwhile, Catlin attempts to solve the wedding woes of a traveling bride and her fianc?after her dress is destroyed in a baggage mishap and Tony attempts to keep an elderly birthday boy from flying to Vegas with his oxygen tank.