When Sarah is named the new commander of a military unit in Italy, she uproots her wife and son Fraser to start a new chapter in a seaside town. He seems uninterested in connecting with the other teenagers on base until he meets Caitlin.

A fracture begins to form within the friend group following Caitlin and Sam's breakup. While Sam turns to the open arms of Britney, Caitlin is judged for spending more time with Fraser.

With his deployment fast-tracked, Craig spontaneously proposes to his Italian girlfriend, Valentina. Determined to ship him off with a celebration he'll never forget, his friends pool their resources for a Hawaiian-themed wedding.

As the power struggle between Sarah and Richard escalates, the relationship between their wives continues to grow. Later, Caitlin asks Fraser for help making a bold statement.

Sarah is thrilled to learn about her son's burgeoning friendship with Jonathan. Richard uses a hunting trip to get inside Caitlin's head. Later, Sarah receives a phone call that will alter life on base.

The friend group fractures even further over their hatred for Colonel Wilson. Richard's insubordination reaches a breaking point, forcing Wilson to make a difficult decision.

Caitlin and Fraser sneak off to catch a concert in Bologna. Along the way, Fraser finally feels comfortable admitting a shocking secret.