''The Young Kieslowski'' is a relationship comedy about Brian Kieslowski and Leslie Mallard, both undergraduates at Caltech, and both socially awkward virgins. At a party, they meet and hook-up. Afterwards, Leslie discovers that she is pregnant with twins, and decides she wants to keep them. Brian, in his first relationship and out of his depth, does what he believes is the right thing. He pretends to support her in her decision, while secretly hoping that she will change her mind. The two of them then embark on a California road trip to break the big news to both of their uniquely dysfunctional families.