Two new doctors arrive at the NATO Role 3 Medical Unit at Kandahar Airfield and must face rocket attacks and waves of wounded soldiers and civilians all in their first 48 hours.

When a sick soldier is brought in, the bacteria that he is infected with quickly spreads to others in the hospital, forcing a quarantine.

Colonel Marks is forced to ask for a walking blood bank. Simon reconnects with a former flame. Rebecca must plan a staff party.

Simon hitches a helicopter ride to his farm. Rebecca must perform emergency neurosurgery on a patient. Bobby and Pedersen try to help an Air Force officer with his insomnia.

Members of a wedding party are injured when they are caught in Taliban crossfire. Rebecca searches for the missing bride. Marks is impressed with Bobby.

Seven injured soldiers anxiously anticipate the arrival of their lucky charm, 19-year-old Pvt. Henry Flax. Rebecca makes a confession to Simon.

Under intense investigation, Rebecca doubts her decision to withhold treatment to a soldier, which may have resulted in his passing. Will her brash actions come back to condemn her?

The relationship between the doctors and nurses is strained when Bobby makes a controversial decision to try to save a patient against all odds. Can the team put their conflict behind them, or is this the beginning of a widening rift between the doctors and nurses at the Role 3 hospital?

Vans' friend is injured in an explosion, and allegiances are called into question.

An Army chaplain must deal with her lapse of faith when she is ordered to hold vigil with Simon during a surgery.

Bobby loses his composure during a hockey game between the allied forces; a prank goes awry for Simon; and the investigation into a sleeping bomber raises ethical questions for Pedersen.

Rebecca takes over triage when Col. Marks is injured in an explosion, and the situation leaves Rebecca with a judgment call to make.

An attack on the women's clinic takes its toll. The Role 3 hospital contends with significant losses while fighting to save a wounded assailant's life.