When 17-year-old Anna Lorentz returns to Narvik in 1940 with her older sisters and brother, they find their town destroyed. They recover the family home, and survive the years that follow by running a hair salon. All this time, Anna nurtures her own dream.
Billy falls madly in love with Nilo, but discovers that her great love is polyamorous. Explosions in the heart studies the turbulent and impossible romantic relationship between two young women where one is polyamorous, and finding one’s own autonomy and power independently of others.
Agnes and Ragnar, a couple in their late 20s, are planning to climb a mountain in Northern Norway. In this potentially deadly situation where trust is an absolute necessity, the relationship is put to the test as Agnes reveals Ragnars disturbing secret.
Unn is 80 years old, lives in a nursery home and is looking for love. Her body bear witness of a long life, but on the inside beats the heart of a twenty year old girl. When a 25 year old boy becomes Unns new nurse, her heart beats faster and faster, and an old love bloom.