Alexander never liked mathematics, and teacher Tatyana Evgenievna always seemed like a vixen to him. But at a alumni meeting, he accidentally met the hated mathematician and disappeared! Young, beautiful, smart, she made him forget about everything - the difference in age, prejudices, conventions. But those around him did not forget about this - Alexander’s parents, Tatyana’s husband, friends and acquaintances. You have to fight for love. Will lovers have enough strength for this? After all, life throws up problems that cannot be compared with problems from a textbook...