Sam and Lena

Kara is a firefighting lieutenant with the National City Fire Department stationed at firehouse 56.

Lena is the CEO of her company L-Corp.

Their paths cross when Kara is called out to an apartment block on fire and Lena gets stuck with no way out after helping other people get to safety, Kara coming to her rescue.

Lena has no time whatsoever for romantic relationships due to her work and a messy break up she had but begins to reconsider when she is saved a few more times by the tall and hunky blonde who suddenly becomes a big part of her life.