When the communication stones malfunction and transport Young’s consciousness to an unknown alien vessel, the crew of the Destiny reveal themselves to a powerful race.

When one of the crew becomes the prime suspect in a crime, the others must determine the individual’s guilt.

Some of the crew use the Ancient Long Range Communications Device to reassure their loved ones that they are okay.

The episode begins as a group from the Destiny is coming through a Stargate onto a humid jungle type world. Shortly afterwords crew members start getting sick and the team quarantines itself on the planet. Then the real problems start up!

Young, Eli, and Chloe use the Ancient communication device to contact Earth. Telford takes over command of the Destiny during the switch, while Williams and O’Neill inform the trio about a potentially dangerous plan that could bring them all back to Earth ().

The ship arrives at an ice planet so the crew can replenish their water supply. While Scott and Young look for suitable ice, the rest of the crew learns that the living dust cloud from “Air (Part 3)” has stowed away on the ship and is rapidly absorbing their remaining water.

Following from the end of “Darkness”, the Destiny is on a collision course with a star. A plan is devised to use the last working shuttle to evacuate to one of the three planets. However, there is only room for seventeen people and no time for additional trips, so a lottery is held to determine who will leave.

Power fails on the Destiny, but the ship has maneuvered toward three probably-habitable planets to save the crew. Meanwhile, Eli Wallace records individual messages from the crew in case they don’t survive.

During an official visit to top secret base Icarus, an attack is made, forcing the team to evacuate. Before they could evacuate to Earth, Dr. Nicholas Rush dials the nine chevron address ( ), sending them to Destiny , an Ancient starship located billions of lightyears from Earth.